Home / 725,613.98-1,001,359.28-398,940.80

Finding the Fourth Proportional to 725,613.98, 1,001,359.28 and 398,940.80

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Solution

The fourth proportional to 725,613.98, 1,001,359.28 and 398,940.80 is: 550,544.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    725,613.98 : 1,001,359.28 = 398,940.80 : x
  2. Step 2: Convert to fraction form
    725,613.98/1,001,359.28 = 398,940.80/x
  3. Step 3: Cross multiply
    725,613.98x = 1,001,359.28 × 398,940.80
  4. Step 4: Simplify right side
    725,613.98x = 399,483,072,250.62
  5. Step 5: Solve for x
    x = 399,483,072,250.62/725,613.98
  6. Step 6: Final answer
    x = 550,544.89

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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.