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Finding the Fourth Proportional to 64.48, 96 and 61.38

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Solution

The fourth proportional to 64.48, 96 and 61.38 is: 91.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    64.48 : 96 = 61.38 : x
  2. Step 2: Convert to fraction form
    64.48/96 = 61.38/x
  3. Step 3: Cross multiply
    64.48x = 96 × 61.38
  4. Step 4: Simplify right side
    64.48x = 5,892.48
  5. Step 5: Solve for x
    x = 5,892.48/64.48
  6. Step 6: Final answer
    x = 91.38

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1.5x scale

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.