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Finding the Fourth Proportional to 715,071.65, 986,772.33 and 392,762.52

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Solution

The fourth proportional to 715,071.65, 986,772.33 and 392,762.52 is: 541,997.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,071.65 : 986,772.33 = 392,762.52 : x
  2. Step 2: Convert to fraction form
    715,071.65/986,772.33 = 392,762.52/x
  3. Step 3: Cross multiply
    715,071.65x = 986,772.33 × 392,762.52
  4. Step 4: Simplify right side
    715,071.65x = 387,567,186,997.07
  5. Step 5: Solve for x
    x = 387,567,186,997.07/715,071.65
  6. Step 6: Final answer
    x = 541,997.70

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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.