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Finding the Fourth Proportional to 517.83, 714.02 and 399.54

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Solution

The fourth proportional to 517.83, 714.02 and 399.54 is: 550.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    517.83 : 714.02 = 399.54 : x
  2. Step 2: Convert to fraction form
    517.83/714.02 = 399.54/x
  3. Step 3: Cross multiply
    517.83x = 714.02 × 399.54
  4. Step 4: Simplify right side
    517.83x = 285,275.98
  5. Step 5: Solve for x
    x = 285,275.98/517.83
  6. Step 6: Final answer
    x = 550.91

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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.