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Finding the Fourth Proportional to 725,158.65, 1,000,736.76 and 398,469

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Solution

The fourth proportional to 725,158.65, 1,000,736.76 and 398,469 is: 549,897.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    725,158.65 : 1,000,736.76 = 398,469 : x
  2. Step 2: Convert to fraction form
    725,158.65/1,000,736.76 = 398,469/x
  3. Step 3: Cross multiply
    725,158.65x = 1,000,736.76 × 398,469
  4. Step 4: Simplify right side
    725,158.65x = 398,762,576,020.44
  5. Step 5: Solve for x
    x = 398,762,576,020.44/725,158.65
  6. Step 6: Final answer
    x = 549,897.01

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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.