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Finding the Fourth Proportional to 64.20, 95.72 and 62.40

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Solution

The fourth proportional to 64.20, 95.72 and 62.40 is: 93.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    64.20 : 95.72 = 62.40 : x
  2. Step 2: Convert to fraction form
    64.20/95.72 = 62.40/x
  3. Step 3: Cross multiply
    64.20x = 95.72 × 62.40
  4. Step 4: Simplify right side
    64.20x = 5,972.93
  5. Step 5: Solve for x
    x = 5,972.93/64.20
  6. Step 6: Final answer
    x = 93.04

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.