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Finding the Fourth Proportional to 43.53, 65.28 and 31.34

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Solution

The fourth proportional to 43.53, 65.28 and 31.34 is: 46.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    43.53 : 65.28 = 31.34 : x
  2. Step 2: Convert to fraction form
    43.53/65.28 = 31.34/x
  3. Step 3: Cross multiply
    43.53x = 65.28 × 31.34
  4. Step 4: Simplify right side
    43.53x = 2,045.39
  5. Step 5: Solve for x
    x = 2,045.39/43.53
  6. Step 6: Final answer
    x = 46.99

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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.