Home / 420,395.90-580,158.68-229,421.61

Finding the Fourth Proportional to 420,395.90, 580,158.68 and 229,421.61

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Solution

The fourth proportional to 420,395.90, 580,158.68 and 229,421.61 is: 316,608.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,395.90 : 580,158.68 = 229,421.61 : x
  2. Step 2: Convert to fraction form
    420,395.90/580,158.68 = 229,421.61/x
  3. Step 3: Cross multiply
    420,395.90x = 580,158.68 × 229,421.61
  4. Step 4: Simplify right side
    420,395.90x = 133,100,937,273.97
  5. Step 5: Solve for x
    x = 133,100,937,273.97/420,395.90
  6. Step 6: Final answer
    x = 316,608.56

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.