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Finding the Fourth Proportional to 911,005.20, 1,366,896.60 and 437,446.80

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Solution

The fourth proportional to 911,005.20, 1,366,896.60 and 437,446.80 is: 656,356.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    911,005.20 : 1,366,896.60 = 437,446.80 : x
  2. Step 2: Convert to fraction form
    911,005.20/1,366,896.60 = 437,446.80/x
  3. Step 3: Cross multiply
    911,005.20x = 1,366,896.60 × 437,446.80
  4. Step 4: Simplify right side
    911,005.20x = 597,944,543,600.88
  5. Step 5: Solve for x
    x = 597,944,543,600.88/911,005.20
  6. Step 6: Final answer
    x = 656,356.89

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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.