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Finding the Fourth Proportional to 517.19, 713.72 and 284.31

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Solution

The fourth proportional to 517.19, 713.72 and 284.31 is: 392.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    517.19 : 713.72 = 284.31 : x
  2. Step 2: Convert to fraction form
    517.19/713.72 = 284.31/x
  3. Step 3: Cross multiply
    517.19x = 713.72 × 284.31
  4. Step 4: Simplify right side
    517.19x = 202,919.52
  5. Step 5: Solve for x
    x = 202,919.52/517.19
  6. Step 6: Final answer
    x = 392.35

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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.