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Finding the Fourth Proportional to 660,905.64, 991,356.54 and 187,591.44

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Solution

The fourth proportional to 660,905.64, 991,356.54 and 187,591.44 is: 281,386.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,905.64 : 991,356.54 = 187,591.44 : x
  2. Step 2: Convert to fraction form
    660,905.64/991,356.54 = 187,591.44/x
  3. Step 3: Cross multiply
    660,905.64x = 991,356.54 × 187,591.44
  4. Step 4: Simplify right side
    660,905.64x = 185,970,000,892.02
  5. Step 5: Solve for x
    x = 185,970,000,892.02/660,905.64
  6. Step 6: Final answer
    x = 281,386.62

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.