Home / 721,931.13-996,527.80-420,125.13

Finding the Fourth Proportional to 721,931.13, 996,527.80 and 420,125.13

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Solution

The fourth proportional to 721,931.13, 996,527.80 and 420,125.13 is: 579,925.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,931.13 : 996,527.80 = 420,125.13 : x
  2. Step 2: Convert to fraction form
    721,931.13/996,527.80 = 420,125.13/x
  3. Step 3: Cross multiply
    721,931.13x = 996,527.80 × 420,125.13
  4. Step 4: Simplify right side
    721,931.13x = 418,666,371,523.61
  5. Step 5: Solve for x
    x = 418,666,371,523.61/721,931.13
  6. Step 6: Final answer
    x = 579,925.64

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Double scale
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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.