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Finding the Fourth Proportional to 517.09, 713.58 and 284.21

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Solution

The fourth proportional to 517.09, 713.58 and 284.21 is: 392.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    517.09 : 713.58 = 284.21 : x
  2. Step 2: Convert to fraction form
    517.09/713.58 = 284.21/x
  3. Step 3: Cross multiply
    517.09x = 713.58 × 284.21
  4. Step 4: Simplify right side
    517.09x = 202,806.57
  5. Step 5: Solve for x
    x = 202,806.57/517.09
  6. Step 6: Final answer
    x = 392.21

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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.