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Finding the Fourth Proportional to 65.26, 97.40 and 56.65

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Solution

The fourth proportional to 65.26, 97.40 and 56.65 is: 84.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    65.26 : 97.40 = 56.65 : x
  2. Step 2: Convert to fraction form
    65.26/97.40 = 56.65/x
  3. Step 3: Cross multiply
    65.26x = 97.40 × 56.65
  4. Step 4: Simplify right side
    65.26x = 5,517.71
  5. Step 5: Solve for x
    x = 5,517.71/65.26
  6. Step 6: Final answer
    x = 84.55

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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.