Home / 725,520.78-1,001,223.90-398,839.86

Finding the Fourth Proportional to 725,520.78, 1,001,223.90 and 398,839.86

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Solution

The fourth proportional to 725,520.78, 1,001,223.90 and 398,839.86 is: 550,401.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    725,520.78 : 1,001,223.90 = 398,839.86 : x
  2. Step 2: Convert to fraction form
    725,520.78/1,001,223.90 = 398,839.86/x
  3. Step 3: Cross multiply
    725,520.78x = 1,001,223.90 × 398,839.86
  4. Step 4: Simplify right side
    725,520.78x = 399,328,000,104.65
  5. Step 5: Solve for x
    x = 399,328,000,104.65/725,520.78
  6. Step 6: Final answer
    x = 550,401.88

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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.