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Finding the Fourth Proportional to 32.38, 48.84 and 31.30

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Solution

The fourth proportional to 32.38, 48.84 and 31.30 is: 47.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    32.38 : 48.84 = 31.30 : x
  2. Step 2: Convert to fraction form
    32.38/48.84 = 31.30/x
  3. Step 3: Cross multiply
    32.38x = 48.84 × 31.30
  4. Step 4: Simplify right side
    32.38x = 1,528.69
  5. Step 5: Solve for x
    x = 1,528.69/32.38
  6. Step 6: Final answer
    x = 47.21

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.