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Finding the Fourth Proportional to 43.30, 65.16 and 39.11

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Solution

The fourth proportional to 43.30, 65.16 and 39.11 is: 58.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    43.30 : 65.16 = 39.11 : x
  2. Step 2: Convert to fraction form
    43.30/65.16 = 39.11/x
  3. Step 3: Cross multiply
    43.30x = 65.16 × 39.11
  4. Step 4: Simplify right side
    43.30x = 2,548.41
  5. Step 5: Solve for x
    x = 2,548.41/43.30
  6. Step 6: Final answer
    x = 58.85

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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.