Home / 420,907.61-580,843.07-229,921.76

Finding the Fourth Proportional to 420,907.61, 580,843.07 and 229,921.76

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Solution

The fourth proportional to 420,907.61, 580,843.07 and 229,921.76 is: 317,286.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,907.61 : 580,843.07 = 229,921.76 : x
  2. Step 2: Convert to fraction form
    420,907.61/580,843.07 = 229,921.76/x
  3. Step 3: Cross multiply
    420,907.61x = 580,843.07 × 229,921.76
  4. Step 4: Simplify right side
    420,907.61x = 133,548,462,102.91
  5. Step 5: Solve for x
    x = 133,548,462,102.91/420,907.61
  6. Step 6: Final answer
    x = 317,286.88

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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.