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Finding the Fourth Proportional to 515.60, 711.24 and 329.02

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Solution

The fourth proportional to 515.60, 711.24 and 329.02 is: 453.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    515.60 : 711.24 = 329.02 : x
  2. Step 2: Convert to fraction form
    515.60/711.24 = 329.02/x
  3. Step 3: Cross multiply
    515.60x = 711.24 × 329.02
  4. Step 4: Simplify right side
    515.60x = 234,012.18
  5. Step 5: Solve for x
    x = 234,012.18/515.60
  6. Step 6: Final answer
    x = 453.86

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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.