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Finding the Fourth Proportional to 330.90, 495.67 and 249.50

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Solution

The fourth proportional to 330.90, 495.67 and 249.50 is: 373.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    330.90 : 495.67 = 249.50 : x
  2. Step 2: Convert to fraction form
    330.90/495.67 = 249.50/x
  3. Step 3: Cross multiply
    330.90x = 495.67 × 249.50
  4. Step 4: Simplify right side
    330.90x = 123,669.67
  5. Step 5: Solve for x
    x = 123,669.67/330.90
  6. Step 6: Final answer
    x = 373.74

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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.