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Finding the Fourth Proportional to 718,543.98, 991,576.89 and 396,283.86

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Solution

The fourth proportional to 718,543.98, 991,576.89 and 396,283.86 is: 546,864.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,543.98 : 991,576.89 = 396,283.86 : x
  2. Step 2: Convert to fraction form
    718,543.98/991,576.89 = 396,283.86/x
  3. Step 3: Cross multiply
    718,543.98x = 991,576.89 × 396,283.86
  4. Step 4: Simplify right side
    718,543.98x = 392,945,917,456.00
  5. Step 5: Solve for x
    x = 392,945,917,456.00/718,543.98
  6. Step 6: Final answer
    x = 546,864.11

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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.