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Finding the Fourth Proportional to 64.31, 95.81 and 63.50

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Solution

The fourth proportional to 64.31, 95.81 and 63.50 is: 94.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    64.31 : 95.81 = 63.50 : x
  2. Step 2: Convert to fraction form
    64.31/95.81 = 63.50/x
  3. Step 3: Cross multiply
    64.31x = 95.81 × 63.50
  4. Step 4: Simplify right side
    64.31x = 6,083.14
  5. Step 5: Solve for x
    x = 6,083.14/64.31
  6. Step 6: Final answer
    x = 94.60

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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.