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Finding the Fourth Proportional to 519.18, 716.55 and 353.30

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Solution

The fourth proportional to 519.18, 716.55 and 353.30 is: 487.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    519.18 : 716.55 = 353.30 : x
  2. Step 2: Convert to fraction form
    519.18/716.55 = 353.30/x
  3. Step 3: Cross multiply
    519.18x = 716.55 × 353.30
  4. Step 4: Simplify right side
    519.18x = 253,157.12
  5. Step 5: Solve for x
    x = 253,157.12/519.18
  6. Step 6: Final answer
    x = 487.61

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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.