Home / 721,788.22-996,036.42-399,479.10

Finding the Fourth Proportional to 721,788.22, 996,036.42 and 399,479.10

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Solution

The fourth proportional to 721,788.22, 996,036.42 and 399,479.10 is: 551,263.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,788.22 : 996,036.42 = 399,479.10 : x
  2. Step 2: Convert to fraction form
    721,788.22/996,036.42 = 399,479.10/x
  3. Step 3: Cross multiply
    721,788.22x = 996,036.42 × 399,479.10
  4. Step 4: Simplify right side
    721,788.22x = 397,895,732,628.82
  5. Step 5: Solve for x
    x = 397,895,732,628.82/721,788.22
  6. Step 6: Final answer
    x = 551,263.82

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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.