Home / 723,756.80-1,085,635.20-643,577.60

Finding the Fourth Proportional to 723,756.80, 1,085,635.20 and 643,577.60

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Solution

The fourth proportional to 723,756.80, 1,085,635.20 and 643,577.60 is: 965,366.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    723,756.80 : 1,085,635.20 = 643,577.60 : x
  2. Step 2: Convert to fraction form
    723,756.80/1,085,635.20 = 643,577.60/x
  3. Step 3: Cross multiply
    723,756.80x = 1,085,635.20 × 643,577.60
  4. Step 4: Simplify right side
    723,756.80x = 698,690,496,491.52
  5. Step 5: Solve for x
    x = 698,690,496,491.52/723,756.80
  6. Step 6: Final answer
    x = 965,366.40

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Double scale
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Similar ratio
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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.