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Finding the Fourth Proportional to 330.95, 496.45 and 87.47

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Solution

The fourth proportional to 330.95, 496.45 and 87.47 is: 131.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    330.95 : 496.45 = 87.47 : x
  2. Step 2: Convert to fraction form
    330.95/496.45 = 87.47/x
  3. Step 3: Cross multiply
    330.95x = 496.45 × 87.47
  4. Step 4: Simplify right side
    330.95x = 43,423.48
  5. Step 5: Solve for x
    x = 43,423.48/330.95
  6. Step 6: Final answer
    x = 131.21

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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.