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Finding the Fourth Proportional to 539,805.18, 809,988.03 and 220,191.60

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Solution

The fourth proportional to 539,805.18, 809,988.03 and 220,191.60 is: 330,401.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    539,805.18 : 809,988.03 = 220,191.60 : x
  2. Step 2: Convert to fraction form
    539,805.18/809,988.03 = 220,191.60/x
  3. Step 3: Cross multiply
    539,805.18x = 809,988.03 × 220,191.60
  4. Step 4: Simplify right side
    539,805.18x = 178,352,560,306.55
  5. Step 5: Solve for x
    x = 178,352,560,306.55/539,805.18
  6. Step 6: Final answer
    x = 330,401.72

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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.