Home / 725,715.72-1,001,400.47-398,974.97

Finding the Fourth Proportional to 725,715.72, 1,001,400.47 and 398,974.97

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Solution

The fourth proportional to 725,715.72, 1,001,400.47 and 398,974.97 is: 550,537.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    725,715.72 : 1,001,400.47 = 398,974.97 : x
  2. Step 2: Convert to fraction form
    725,715.72/1,001,400.47 = 398,974.97/x
  3. Step 3: Cross multiply
    725,715.72x = 1,001,400.47 × 398,974.97
  4. Step 4: Simplify right side
    725,715.72x = 399,533,718,848.14
  5. Step 5: Solve for x
    x = 399,533,718,848.14/725,715.72
  6. Step 6: Final answer
    x = 550,537.50

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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.