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Finding the Fourth Proportional to 519.82, 716.85 and 317.88

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Solution

The fourth proportional to 519.82, 716.85 and 317.88 is: 438.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    519.82 : 716.85 = 317.88 : x
  2. Step 2: Convert to fraction form
    519.82/716.85 = 317.88/x
  3. Step 3: Cross multiply
    519.82x = 716.85 × 317.88
  4. Step 4: Simplify right side
    519.82x = 227,872.28
  5. Step 5: Solve for x
    x = 227,872.28/519.82
  6. Step 6: Final answer
    x = 438.37

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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.