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Finding the Fourth Proportional to 519.29, 716.49 and 351.55

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Solution

The fourth proportional to 519.29, 716.49 and 351.55 is: 485.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    519.29 : 716.49 = 351.55 : x
  2. Step 2: Convert to fraction form
    519.29/716.49 = 351.55/x
  3. Step 3: Cross multiply
    519.29x = 716.49 × 351.55
  4. Step 4: Simplify right side
    519.29x = 251,882.06
  5. Step 5: Solve for x
    x = 251,882.06/519.29
  6. Step 6: Final answer
    x = 485.05

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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.