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Finding the Fourth Proportional to 330.41, 495.61 and 86.93

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Solution

The fourth proportional to 330.41, 495.61 and 86.93 is: 130.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    330.41 : 495.61 = 86.93 : x
  2. Step 2: Convert to fraction form
    330.41/495.61 = 86.93/x
  3. Step 3: Cross multiply
    330.41x = 495.61 × 86.93
  4. Step 4: Simplify right side
    330.41x = 43,083.38
  5. Step 5: Solve for x
    x = 43,083.38/330.41
  6. Step 6: Final answer
    x = 130.39

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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.