Home / 1,398,132.30-1,928,400.03-913,920.78

Finding the Fourth Proportional to 1,398,132.30, 1,928,400.03 and 913,920.78

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Solution

The fourth proportional to 1,398,132.30, 1,928,400.03 and 913,920.78 is: 1,260,542.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,398,132.30 : 1,928,400.03 = 913,920.78 : x
  2. Step 2: Convert to fraction form
    1,398,132.30/1,928,400.03 = 913,920.78/x
  3. Step 3: Cross multiply
    1,398,132.30x = 1,928,400.03 × 913,920.78
  4. Step 4: Simplify right side
    1,398,132.30x = 1,762,404,859,569.62
  5. Step 5: Solve for x
    x = 1,762,404,859,569.62/1,398,132.30
  6. Step 6: Final answer
    x = 1,260,542.27

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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.