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Finding the Fourth Proportional to 291,687.80, 437,531.70 and 272,004.80

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Solution

The fourth proportional to 291,687.80, 437,531.70 and 272,004.80 is: 408,007.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,687.80 : 437,531.70 = 272,004.80 : x
  2. Step 2: Convert to fraction form
    291,687.80/437,531.70 = 272,004.80/x
  3. Step 3: Cross multiply
    291,687.80x = 437,531.70 × 272,004.80
  4. Step 4: Simplify right side
    291,687.80x = 119,010,722,552.16
  5. Step 5: Solve for x
    x = 119,010,722,552.16/291,687.80
  6. Step 6: Final answer
    x = 408,007.20

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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.