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Finding the Fourth Proportional to 310.78, 466.17 and 118.30

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Solution

The fourth proportional to 310.78, 466.17 and 118.30 is: 177.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    310.78 : 466.17 = 118.30 : x
  2. Step 2: Convert to fraction form
    310.78/466.17 = 118.30/x
  3. Step 3: Cross multiply
    310.78x = 466.17 × 118.30
  4. Step 4: Simplify right side
    310.78x = 55,147.91
  5. Step 5: Solve for x
    x = 55,147.91/310.78
  6. Step 6: Final answer
    x = 177.45

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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.