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Finding the Fourth Proportional to 982.68, 1,472.68 and 543.28

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Solution

The fourth proportional to 982.68, 1,472.68 and 543.28 is: 814.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    982.68 : 1,472.68 = 543.28 : x
  2. Step 2: Convert to fraction form
    982.68/1,472.68 = 543.28/x
  3. Step 3: Cross multiply
    982.68x = 1,472.68 × 543.28
  4. Step 4: Simplify right side
    982.68x = 800,077.59
  5. Step 5: Solve for x
    x = 800,077.59/982.68
  6. Step 6: Final answer
    x = 814.18

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.