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Finding the Fourth Proportional to 55.50, 83.18 and 32.31

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Solution

The fourth proportional to 55.50, 83.18 and 32.31 is: 48.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    55.50 : 83.18 = 32.31 : x
  2. Step 2: Convert to fraction form
    55.50/83.18 = 32.31/x
  3. Step 3: Cross multiply
    55.50x = 83.18 × 32.31
  4. Step 4: Simplify right side
    55.50x = 2,687.38
  5. Step 5: Solve for x
    x = 2,687.38/55.50
  6. Step 6: Final answer
    x = 48.42

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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.