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Finding the Fourth Proportional to 65.09, 96.92 and 64.79

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Solution

The fourth proportional to 65.09, 96.92 and 64.79 is: 96.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    65.09 : 96.92 = 64.79 : x
  2. Step 2: Convert to fraction form
    65.09/96.92 = 64.79/x
  3. Step 3: Cross multiply
    65.09x = 96.92 × 64.79
  4. Step 4: Simplify right side
    65.09x = 6,279.45
  5. Step 5: Solve for x
    x = 6,279.45/65.09
  6. Step 6: Final answer
    x = 96.47

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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.