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Finding the Fourth Proportional to 437.52, 655.56 and 421.68

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Solution

The fourth proportional to 437.52, 655.56 and 421.68 is: 631.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    437.52 : 655.56 = 421.68 : x
  2. Step 2: Convert to fraction form
    437.52/655.56 = 421.68/x
  3. Step 3: Cross multiply
    437.52x = 655.56 × 421.68
  4. Step 4: Simplify right side
    437.52x = 276,436.54
  5. Step 5: Solve for x
    x = 276,436.54/437.52
  6. Step 6: Final answer
    x = 631.83

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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.