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Finding the Fourth Proportional to 64.49, 95.42 and 64.31

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Solution

The fourth proportional to 64.49, 95.42 and 64.31 is: 95.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    64.49 : 95.42 = 64.31 : x
  2. Step 2: Convert to fraction form
    64.49/95.42 = 64.31/x
  3. Step 3: Cross multiply
    64.49x = 95.42 × 64.31
  4. Step 4: Simplify right side
    64.49x = 6,136.46
  5. Step 5: Solve for x
    x = 6,136.46/64.49
  6. Step 6: Final answer
    x = 95.15

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Why These Related Problems?

These problems maintain the same ratio (1.48) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.