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Finding the Fourth Proportional to 424.32, 635.60 and 308.56

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Solution

The fourth proportional to 424.32, 635.60 and 308.56 is: 462.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    424.32 : 635.60 = 308.56 : x
  2. Step 2: Convert to fraction form
    424.32/635.60 = 308.56/x
  3. Step 3: Cross multiply
    424.32x = 635.60 × 308.56
  4. Step 4: Simplify right side
    424.32x = 196,120.74
  5. Step 5: Solve for x
    x = 196,120.74/424.32
  6. Step 6: Final answer
    x = 462.20

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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.