Home / 1,277,728,442.70-1,915,836,836.85-665,508,410.70

Finding the Fourth Proportional to 1,277,728,442.70, 1,915,836,836.85 and 665,508,410.70

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Solution

The fourth proportional to 1,277,728,442.70, 1,915,836,836.85 and 665,508,410.70 is: 997,868,941.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,277,728,442.70 : 1,915,836,836.85 = 665,508,410.70 : x
  2. Step 2: Convert to fraction form
    1,277,728,442.70/1,915,836,836.85 = 665,508,410.70/x
  3. Step 3: Cross multiply
    1,277,728,442.70x = 1,915,836,836.85 × 665,508,410.70
  4. Step 4: Simplify right side
    1,277,728,442.70x = 1,275,005,528,452,558,848
  5. Step 5: Solve for x
    x = 1,275,005,528,452,558,848/1,277,728,442.70
  6. Step 6: Final answer
    x = 997,868,941.35

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Double scale
Find fourth proportional to 1,277,728,443.70, 1,915,836,838.35 and 665,508,411.70
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.