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Finding the Fourth Proportional to 515.96, 711.60 and 329.30

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Solution

The fourth proportional to 515.96, 711.60 and 329.30 is: 454.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    515.96 : 711.60 = 329.30 : x
  2. Step 2: Convert to fraction form
    515.96/711.60 = 329.30/x
  3. Step 3: Cross multiply
    515.96x = 711.60 × 329.30
  4. Step 4: Simplify right side
    515.96x = 234,329.88
  5. Step 5: Solve for x
    x = 234,329.88/515.96
  6. Step 6: Final answer
    x = 454.16

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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.