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Finding the Fourth Proportional to 65.16, 96.89 and 64.49

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Solution

The fourth proportional to 65.16, 96.89 and 64.49 is: 95.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    65.16 : 96.89 = 64.49 : x
  2. Step 2: Convert to fraction form
    65.16/96.89 = 64.49/x
  3. Step 3: Cross multiply
    65.16x = 96.89 × 64.49
  4. Step 4: Simplify right side
    65.16x = 6,247.63
  5. Step 5: Solve for x
    x = 6,247.63/65.16
  6. Step 6: Final answer
    x = 95.88

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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.