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Finding the Fourth Proportional to 64.64, 97.66 and 63.96

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Solution

The fourth proportional to 64.64, 97.66 and 63.96 is: 96.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    64.64 : 97.66 = 63.96 : x
  2. Step 2: Convert to fraction form
    64.64/97.66 = 63.96/x
  3. Step 3: Cross multiply
    64.64x = 97.66 × 63.96
  4. Step 4: Simplify right side
    64.64x = 6,246.33
  5. Step 5: Solve for x
    x = 6,246.33/64.64
  6. Step 6: Final answer
    x = 96.63

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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.