Home / 420,912.20-631,363.98-243,306.20

Finding the Fourth Proportional to 420,912.20, 631,363.98 and 243,306.20

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Solution

The fourth proportional to 420,912.20, 631,363.98 and 243,306.20 is: 364,956.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,912.20 : 631,363.98 = 243,306.20 : x
  2. Step 2: Convert to fraction form
    420,912.20/631,363.98 = 243,306.20/x
  3. Step 3: Cross multiply
    420,912.20x = 631,363.98 × 243,306.20
  4. Step 4: Simplify right side
    420,912.20x = 153,614,770,790.68
  5. Step 5: Solve for x
    x = 153,614,770,790.68/420,912.20
  6. Step 6: Final answer
    x = 364,956.80

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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.