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Finding the Fourth Proportional to 64.45, 97.15 and 63.53

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Solution

The fourth proportional to 64.45, 97.15 and 63.53 is: 95.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    64.45 : 97.15 = 63.53 : x
  2. Step 2: Convert to fraction form
    64.45/97.15 = 63.53/x
  3. Step 3: Cross multiply
    64.45x = 97.15 × 63.53
  4. Step 4: Simplify right side
    64.45x = 6,172.32
  5. Step 5: Solve for x
    x = 6,172.32/64.45
  6. Step 6: Final answer
    x = 95.78

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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.