Home / 420,142.60-628,865.10-220,177.80

Finding the Fourth Proportional to 420,142.60, 628,865.10 and 220,177.80

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Solution

The fourth proportional to 420,142.60, 628,865.10 and 220,177.80 is: 329,559.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,142.60 : 628,865.10 = 220,177.80 : x
  2. Step 2: Convert to fraction form
    420,142.60/628,865.10 = 220,177.80/x
  3. Step 3: Cross multiply
    420,142.60x = 628,865.10 × 220,177.80
  4. Step 4: Simplify right side
    420,142.60x = 138,462,134,214.78
  5. Step 5: Solve for x
    x = 138,462,134,214.78/420,142.60
  6. Step 6: Final answer
    x = 329,559.85

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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.