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Finding the Fourth Proportional to 515.84, 711.36 and 329.12

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Solution

The fourth proportional to 515.84, 711.36 and 329.12 is: 453.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    515.84 : 711.36 = 329.12 : x
  2. Step 2: Convert to fraction form
    515.84/711.36 = 329.12/x
  3. Step 3: Cross multiply
    515.84x = 711.36 × 329.12
  4. Step 4: Simplify right side
    515.84x = 234,122.80
  5. Step 5: Solve for x
    x = 234,122.80/515.84
  6. Step 6: Final answer
    x = 453.87

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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.