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Finding the Fourth Proportional to 721,930.13, 996,526.42 and 420,124.13

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Solution

The fourth proportional to 721,930.13, 996,526.42 and 420,124.13 is: 579,924.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,930.13 : 996,526.42 = 420,124.13 : x
  2. Step 2: Convert to fraction form
    721,930.13/996,526.42 = 420,124.13/x
  3. Step 3: Cross multiply
    721,930.13x = 996,526.42 × 420,124.13
  4. Step 4: Simplify right side
    721,930.13x = 418,664,795,224.52
  5. Step 5: Solve for x
    x = 418,664,795,224.52/721,930.13
  6. Step 6: Final answer
    x = 579,924.26

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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.