Home / 726,720.60-1,002,921.54-404,429.70

Finding the Fourth Proportional to 726,720.60, 1,002,921.54 and 404,429.70

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Solution

The fourth proportional to 726,720.60, 1,002,921.54 and 404,429.70 is: 558,139.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    726,720.60 : 1,002,921.54 = 404,429.70 : x
  2. Step 2: Convert to fraction form
    726,720.60/1,002,921.54 = 404,429.70/x
  3. Step 3: Cross multiply
    726,720.60x = 1,002,921.54 × 404,429.70
  4. Step 4: Simplify right side
    726,720.60x = 405,611,257,545.74
  5. Step 5: Solve for x
    x = 405,611,257,545.74/726,720.60
  6. Step 6: Final answer
    x = 558,139.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.