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Finding the Fourth Proportional to 330.95, 495.52 and 319.21

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Solution

The fourth proportional to 330.95, 495.52 and 319.21 is: 477.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    330.95 : 495.52 = 319.21 : x
  2. Step 2: Convert to fraction form
    330.95/495.52 = 319.21/x
  3. Step 3: Cross multiply
    330.95x = 495.52 × 319.21
  4. Step 4: Simplify right side
    330.95x = 158,172.90
  5. Step 5: Solve for x
    x = 158,172.90/330.95
  6. Step 6: Final answer
    x = 477.93

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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.