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Finding the Fourth Proportional to 64, 88.17 and 63.28

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Solution

The fourth proportional to 64, 88.17 and 63.28 is: 87.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    64 : 88.17 = 63.28 : x
  2. Step 2: Convert to fraction form
    64/88.17 = 63.28/x
  3. Step 3: Cross multiply
    64x = 88.17 × 63.28
  4. Step 4: Simplify right side
    64x = 5,579.40
  5. Step 5: Solve for x
    x = 5,579.40/64
  6. Step 6: Final answer
    x = 87.18

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.