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Finding the Fourth Proportional to 65.36, 97.42 and 63.80

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Solution

The fourth proportional to 65.36, 97.42 and 63.80 is: 95.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    65.36 : 97.42 = 63.80 : x
  2. Step 2: Convert to fraction form
    65.36/97.42 = 63.80/x
  3. Step 3: Cross multiply
    65.36x = 97.42 × 63.80
  4. Step 4: Simplify right side
    65.36x = 6,215.40
  5. Step 5: Solve for x
    x = 6,215.40/65.36
  6. Step 6: Final answer
    x = 95.09

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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.