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Finding the Fourth Proportional to 717,251.76, 989,807.33 and 394,961.06

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Solution

The fourth proportional to 717,251.76, 989,807.33 and 394,961.06 is: 545,046.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,251.76 : 989,807.33 = 394,961.06 : x
  2. Step 2: Convert to fraction form
    717,251.76/989,807.33 = 394,961.06/x
  3. Step 3: Cross multiply
    717,251.76x = 989,807.33 × 394,961.06
  4. Step 4: Simplify right side
    717,251.76x = 390,935,345,328.73
  5. Step 5: Solve for x
    x = 390,935,345,328.73/717,251.76
  6. Step 6: Final answer
    x = 545,046.20

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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.