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Finding the Fourth Proportional to 519.52, 716.88 and 312.48

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Solution

The fourth proportional to 519.52, 716.88 and 312.48 is: 431.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    519.52 : 716.88 = 312.48 : x
  2. Step 2: Convert to fraction form
    519.52/716.88 = 312.48/x
  3. Step 3: Cross multiply
    519.52x = 716.88 × 312.48
  4. Step 4: Simplify right side
    519.52x = 224,010.66
  5. Step 5: Solve for x
    x = 224,010.66/519.52
  6. Step 6: Final answer
    x = 431.19

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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.