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Finding the Fourth Proportional to 64.62, 97.40 and 61.88

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Solution

The fourth proportional to 64.62, 97.40 and 61.88 is: 93.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    64.62 : 97.40 = 61.88 : x
  2. Step 2: Convert to fraction form
    64.62/97.40 = 61.88/x
  3. Step 3: Cross multiply
    64.62x = 97.40 × 61.88
  4. Step 4: Simplify right side
    64.62x = 6,026.32
  5. Step 5: Solve for x
    x = 6,026.32/64.62
  6. Step 6: Final answer
    x = 93.26

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.