Home / 420,915.28-580,841.43-229,891.76

Finding the Fourth Proportional to 420,915.28, 580,841.43 and 229,891.76

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Solution

The fourth proportional to 420,915.28, 580,841.43 and 229,891.76 is: 317,238.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,915.28 : 580,841.43 = 229,891.76 : x
  2. Step 2: Convert to fraction form
    420,915.28/580,841.43 = 229,891.76/x
  3. Step 3: Cross multiply
    420,915.28x = 580,841.43 × 229,891.76
  4. Step 4: Simplify right side
    420,915.28x = 133,530,660,075.72
  5. Step 5: Solve for x
    x = 133,530,660,075.72/420,915.28
  6. Step 6: Final answer
    x = 317,238.81

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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.