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Finding the Fourth Proportional to 712.26, 982.53 and 515.43

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Solution

The fourth proportional to 712.26, 982.53 and 515.43 is: 711.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    712.26 : 982.53 = 515.43 : x
  2. Step 2: Convert to fraction form
    712.26/982.53 = 515.43/x
  3. Step 3: Cross multiply
    712.26x = 982.53 × 515.43
  4. Step 4: Simplify right side
    712.26x = 506,425.44
  5. Step 5: Solve for x
    x = 506,425.44/712.26
  6. Step 6: Final answer
    x = 711.01

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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.