Home / 1,280,123.10-1,920,451.95-427,160.70

Finding the Fourth Proportional to 1,280,123.10, 1,920,451.95 and 427,160.70

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Solution

The fourth proportional to 1,280,123.10, 1,920,451.95 and 427,160.70 is: 640,830.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,280,123.10 : 1,920,451.95 = 427,160.70 : x
  2. Step 2: Convert to fraction form
    1,280,123.10/1,920,451.95 = 427,160.70/x
  3. Step 3: Cross multiply
    1,280,123.10x = 1,920,451.95 × 427,160.70
  4. Step 4: Simplify right side
    1,280,123.10x = 820,341,599,278.37
  5. Step 5: Solve for x
    x = 820,341,599,278.37/1,280,123.10
  6. Step 6: Final answer
    x = 640,830.24

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Double scale
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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.