Home / 725,369.10-1,001,018.43-398,717.78

Finding the Fourth Proportional to 725,369.10, 1,001,018.43 and 398,717.78

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Solution

The fourth proportional to 725,369.10, 1,001,018.43 and 398,717.78 is: 550,235.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    725,369.10 : 1,001,018.43 = 398,717.78 : x
  2. Step 2: Convert to fraction form
    725,369.10/1,001,018.43 = 398,717.78/x
  3. Step 3: Cross multiply
    725,369.10x = 1,001,018.43 × 398,717.78
  4. Step 4: Simplify right side
    725,369.10x = 399,123,841,143.59
  5. Step 5: Solve for x
    x = 399,123,841,143.59/725,369.10
  6. Step 6: Final answer
    x = 550,235.51

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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.