Home / 721,743.76-996,008.28-399,476.08

Finding the Fourth Proportional to 721,743.76, 996,008.28 and 399,476.08

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Solution

The fourth proportional to 721,743.76, 996,008.28 and 399,476.08 is: 551,278.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,743.76 : 996,008.28 = 399,476.08 : x
  2. Step 2: Convert to fraction form
    721,743.76/996,008.28 = 399,476.08/x
  3. Step 3: Cross multiply
    721,743.76x = 996,008.28 × 399,476.08
  4. Step 4: Simplify right side
    721,743.76x = 397,881,483,341.94
  5. Step 5: Solve for x
    x = 397,881,483,341.94/721,743.76
  6. Step 6: Final answer
    x = 551,278.04

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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.