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Finding the Fourth Proportional to 330.95, 495.05 and 253.06

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Solution

The fourth proportional to 330.95, 495.05 and 253.06 is: 378.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    330.95 : 495.05 = 253.06 : x
  2. Step 2: Convert to fraction form
    330.95/495.05 = 253.06/x
  3. Step 3: Cross multiply
    330.95x = 495.05 × 253.06
  4. Step 4: Simplify right side
    330.95x = 125,274.85
  5. Step 5: Solve for x
    x = 125,274.85/330.95
  6. Step 6: Final answer
    x = 378.53

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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.