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Finding the Fourth Proportional to 43.29, 65.06 and 42.15

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Solution

The fourth proportional to 43.29, 65.06 and 42.15 is: 63.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    43.29 : 65.06 = 42.15 : x
  2. Step 2: Convert to fraction form
    43.29/65.06 = 42.15/x
  3. Step 3: Cross multiply
    43.29x = 65.06 × 42.15
  4. Step 4: Simplify right side
    43.29x = 2,742.07
  5. Step 5: Solve for x
    x = 2,742.07/43.29
  6. Step 6: Final answer
    x = 63.34

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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.