Home / 861,468,380.10-1,291,931,521.47-279,067,500.18

Finding the Fourth Proportional to 861,468,380.10, 1,291,931,521.47 and 279,067,500.18

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Solution

The fourth proportional to 861,468,380.10, 1,291,931,521.47 and 279,067,500.18 is: 418,513,445.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    861,468,380.10 : 1,291,931,521.47 = 279,067,500.18 : x
  2. Step 2: Convert to fraction form
    861,468,380.10/1,291,931,521.47 = 279,067,500.18/x
  3. Step 3: Cross multiply
    861,468,380.10x = 1,291,931,521.47 × 279,067,500.18
  4. Step 4: Simplify right side
    861,468,380.10x = 360,536,100,100,376,896
  5. Step 5: Solve for x
    x = 360,536,100,100,376,896/861,468,380.10
  6. Step 6: Final answer
    x = 418,513,445.68

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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.