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Finding the Fourth Proportional to 65.40, 89.59 and 62.97

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Solution

The fourth proportional to 65.40, 89.59 and 62.97 is: 86.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    65.40 : 89.59 = 62.97 : x
  2. Step 2: Convert to fraction form
    65.40/89.59 = 62.97/x
  3. Step 3: Cross multiply
    65.40x = 89.59 × 62.97
  4. Step 4: Simplify right side
    65.40x = 5,641.48
  5. Step 5: Solve for x
    x = 5,641.48/65.40
  6. Step 6: Final answer
    x = 86.26

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.