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Finding the Fourth Proportional to 196.48, 294.67 and 86.77

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Solution

The fourth proportional to 196.48, 294.67 and 86.77 is: 130.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    196.48 : 294.67 = 86.77 : x
  2. Step 2: Convert to fraction form
    196.48/294.67 = 86.77/x
  3. Step 3: Cross multiply
    196.48x = 294.67 × 86.77
  4. Step 4: Simplify right side
    196.48x = 25,568.52
  5. Step 5: Solve for x
    x = 25,568.52/196.48
  6. Step 6: Final answer
    x = 130.13

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.