Home / 420,359.18-580,090.82-229,375.76

Finding the Fourth Proportional to 420,359.18, 580,090.82 and 229,375.76

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Solution

The fourth proportional to 420,359.18, 580,090.82 and 229,375.76 is: 316,535.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,359.18 : 580,090.82 = 229,375.76 : x
  2. Step 2: Convert to fraction form
    420,359.18/580,090.82 = 229,375.76/x
  3. Step 3: Cross multiply
    420,359.18x = 580,090.82 × 229,375.76
  4. Step 4: Simplify right side
    420,359.18x = 133,058,772,706.52
  5. Step 5: Solve for x
    x = 133,058,772,706.52/420,359.18
  6. Step 6: Final answer
    x = 316,535.90

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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.