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Finding the Fourth Proportional to 515,440.92, 711,343.98 and 289,101

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Solution

The fourth proportional to 515,440.92, 711,343.98 and 289,101 is: 398,979.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,440.92 : 711,343.98 = 289,101 : x
  2. Step 2: Convert to fraction form
    515,440.92/711,343.98 = 289,101/x
  3. Step 3: Cross multiply
    515,440.92x = 711,343.98 × 289,101
  4. Step 4: Simplify right side
    515,440.92x = 205,650,255,961.98
  5. Step 5: Solve for x
    x = 205,650,255,961.98/515,440.92
  6. Step 6: Final answer
    x = 398,979.30

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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.