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Finding the Fourth Proportional to 418,401.65, 577,672.33 and 321,432.79

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Solution

The fourth proportional to 418,401.65, 577,672.33 and 321,432.79 is: 443,790.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,401.65 : 577,672.33 = 321,432.79 : x
  2. Step 2: Convert to fraction form
    418,401.65/577,672.33 = 321,432.79/x
  3. Step 3: Cross multiply
    418,401.65x = 577,672.33 × 321,432.79
  4. Step 4: Simplify right side
    418,401.65x = 185,682,828,737.70
  5. Step 5: Solve for x
    x = 185,682,828,737.70/418,401.65
  6. Step 6: Final answer
    x = 443,790.86

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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.