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Finding the Fourth Proportional to 64.91, 96.96 and 58.48

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Solution

The fourth proportional to 64.91, 96.96 and 58.48 is: 87.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    64.91 : 96.96 = 58.48 : x
  2. Step 2: Convert to fraction form
    64.91/96.96 = 58.48/x
  3. Step 3: Cross multiply
    64.91x = 96.96 × 58.48
  4. Step 4: Simplify right side
    64.91x = 5,670.22
  5. Step 5: Solve for x
    x = 5,670.22/64.91
  6. Step 6: Final answer
    x = 87.36

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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.