Home / 861,053,589.50-1,291,785,661.28-278,788,010.36

Finding the Fourth Proportional to 861,053,589.50, 1,291,785,661.28 and 278,788,010.36

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Solution

The fourth proportional to 861,053,589.50, 1,291,785,661.28 and 278,788,010.36 is: 418,248,479.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    861,053,589.50 : 1,291,785,661.28 = 278,788,010.36 : x
  2. Step 2: Convert to fraction form
    861,053,589.50/1,291,785,661.28 = 278,788,010.36/x
  3. Step 3: Cross multiply
    861,053,589.50x = 1,291,785,661.28 × 278,788,010.36
  4. Step 4: Simplify right side
    861,053,589.50x = 360,134,354,314,066,176
  5. Step 5: Solve for x
    x = 360,134,354,314,066,176/861,053,589.50
  6. Step 6: Final answer
    x = 418,248,479.20

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.