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Finding the Fourth Proportional to 64.48, 97.24 and 61.60

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Solution

The fourth proportional to 64.48, 97.24 and 61.60 is: 92.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    64.48 : 97.24 = 61.60 : x
  2. Step 2: Convert to fraction form
    64.48/97.24 = 61.60/x
  3. Step 3: Cross multiply
    64.48x = 97.24 × 61.60
  4. Step 4: Simplify right side
    64.48x = 5,989.98
  5. Step 5: Solve for x
    x = 5,989.98/64.48
  6. Step 6: Final answer
    x = 92.90

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.