Home / 381,721.80-572,801.40-145,234.20

Finding the Fourth Proportional to 381,721.80, 572,801.40 and 145,234.20

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Solution

The fourth proportional to 381,721.80, 572,801.40 and 145,234.20 is: 217,934.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,721.80 : 572,801.40 = 145,234.20 : x
  2. Step 2: Convert to fraction form
    381,721.80/572,801.40 = 145,234.20/x
  3. Step 3: Cross multiply
    381,721.80x = 572,801.40 × 145,234.20
  4. Step 4: Simplify right side
    381,721.80x = 83,190,353,087.88
  5. Step 5: Solve for x
    x = 83,190,353,087.88/381,721.80
  6. Step 6: Final answer
    x = 217,934.51

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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.