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Finding the Fourth Proportional to 717,782.98, 990,731.54 and 423,691.28

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Solution

The fourth proportional to 717,782.98, 990,731.54 and 423,691.28 is: 584,806.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,782.98 : 990,731.54 = 423,691.28 : x
  2. Step 2: Convert to fraction form
    717,782.98/990,731.54 = 423,691.28/x
  3. Step 3: Cross multiply
    717,782.98x = 990,731.54 × 423,691.28
  4. Step 4: Simplify right side
    717,782.98x = 419,764,316,330.40
  5. Step 5: Solve for x
    x = 419,764,316,330.40/717,782.98
  6. Step 6: Final answer
    x = 584,806.73

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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.