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Finding the Fourth Proportional to 437,649.54, 656,474.30 and 138,340.36

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Solution

The fourth proportional to 437,649.54, 656,474.30 and 138,340.36 is: 207,510.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    437,649.54 : 656,474.30 = 138,340.36 : x
  2. Step 2: Convert to fraction form
    437,649.54/656,474.30 = 138,340.36/x
  3. Step 3: Cross multiply
    437,649.54x = 656,474.30 × 138,340.36
  4. Step 4: Simplify right side
    437,649.54x = 90,816,890,992.75
  5. Step 5: Solve for x
    x = 90,816,890,992.75/437,649.54
  6. Step 6: Final answer
    x = 207,510.54

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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.