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Finding the Fourth Proportional to 543,356.80, 814,996.72 and 143,988.76

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Solution

The fourth proportional to 543,356.80, 814,996.72 and 143,988.76 is: 215,972.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,356.80 : 814,996.72 = 143,988.76 : x
  2. Step 2: Convert to fraction form
    543,356.80/814,996.72 = 143,988.76/x
  3. Step 3: Cross multiply
    543,356.80x = 814,996.72 × 143,988.76
  4. Step 4: Simplify right side
    543,356.80x = 117,350,367,116.87
  5. Step 5: Solve for x
    x = 117,350,367,116.87/543,356.80
  6. Step 6: Final answer
    x = 215,972.94

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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.