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Finding the Fourth Proportional to 519.59, 717.31 and 401.31

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Solution

The fourth proportional to 519.59, 717.31 and 401.31 is: 554.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    519.59 : 717.31 = 401.31 : x
  2. Step 2: Convert to fraction form
    519.59/717.31 = 401.31/x
  3. Step 3: Cross multiply
    519.59x = 717.31 × 401.31
  4. Step 4: Simplify right side
    519.59x = 287,864.18
  5. Step 5: Solve for x
    x = 287,864.18/519.59
  6. Step 6: Final answer
    x = 554.02

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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.