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Finding the Fourth Proportional to 60.68, 91.08 and 28.64

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Solution

The fourth proportional to 60.68, 91.08 and 28.64 is: 42.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    60.68 : 91.08 = 28.64 : x
  2. Step 2: Convert to fraction form
    60.68/91.08 = 28.64/x
  3. Step 3: Cross multiply
    60.68x = 91.08 × 28.64
  4. Step 4: Simplify right side
    60.68x = 2,608.53
  5. Step 5: Solve for x
    x = 2,608.53/60.68
  6. Step 6: Final answer
    x = 42.99

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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.