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Finding the Fourth Proportional to 721,332.38, 995,467.99 and 399,036.92

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Solution

The fourth proportional to 721,332.38, 995,467.99 and 399,036.92 is: 550,687.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,332.38 : 995,467.99 = 399,036.92 : x
  2. Step 2: Convert to fraction form
    721,332.38/995,467.99 = 399,036.92/x
  3. Step 3: Cross multiply
    721,332.38x = 995,467.99 × 399,036.92
  4. Step 4: Simplify right side
    721,332.38x = 397,228,474,713.26
  5. Step 5: Solve for x
    x = 397,228,474,713.26/721,332.38
  6. Step 6: Final answer
    x = 550,687.16

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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.