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Finding the Fourth Proportional to 65.48, 97.98 and 47.38

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Solution

The fourth proportional to 65.48, 97.98 and 47.38 is: 70.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    65.48 : 97.98 = 47.38 : x
  2. Step 2: Convert to fraction form
    65.48/97.98 = 47.38/x
  3. Step 3: Cross multiply
    65.48x = 97.98 × 47.38
  4. Step 4: Simplify right side
    65.48x = 4,642.29
  5. Step 5: Solve for x
    x = 4,642.29/65.48
  6. Step 6: Final answer
    x = 70.90

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.