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Finding the Fourth Proportional to 515.52, 711.34 and 329.18

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Solution

The fourth proportional to 515.52, 711.34 and 329.18 is: 454.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    515.52 : 711.34 = 329.18 : x
  2. Step 2: Convert to fraction form
    515.52/711.34 = 329.18/x
  3. Step 3: Cross multiply
    515.52x = 711.34 × 329.18
  4. Step 4: Simplify right side
    515.52x = 234,154.52
  5. Step 5: Solve for x
    x = 234,154.52/515.52
  6. Step 6: Final answer
    x = 454.21

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.