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Finding the Fourth Proportional to 437,924.70, 656,830.56 and 138,435.57

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Solution

The fourth proportional to 437,924.70, 656,830.56 and 138,435.57 is: 207,635.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    437,924.70 : 656,830.56 = 138,435.57 : x
  2. Step 2: Convert to fraction form
    437,924.70/656,830.56 = 138,435.57/x
  3. Step 3: Cross multiply
    437,924.70x = 656,830.56 × 138,435.57
  4. Step 4: Simplify right side
    437,924.70x = 90,928,712,967.02
  5. Step 5: Solve for x
    x = 90,928,712,967.02/437,924.70
  6. Step 6: Final answer
    x = 207,635.50

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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.