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Finding the Fourth Proportional to 65.16, 89.46 and 62.46

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Solution

The fourth proportional to 65.16, 89.46 and 62.46 is: 85.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    65.16 : 89.46 = 62.46 : x
  2. Step 2: Convert to fraction form
    65.16/89.46 = 62.46/x
  3. Step 3: Cross multiply
    65.16x = 89.46 × 62.46
  4. Step 4: Simplify right side
    65.16x = 5,587.67
  5. Step 5: Solve for x
    x = 5,587.67/65.16
  6. Step 6: Final answer
    x = 85.75

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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.