Home / 1,218,391.61-1,681,380.82-667,142.24

Finding the Fourth Proportional to 1,218,391.61, 1,681,380.82 and 667,142.24

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Solution

The fourth proportional to 1,218,391.61, 1,681,380.82 and 667,142.24 is: 920,656.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,218,391.61 : 1,681,380.82 = 667,142.24 : x
  2. Step 2: Convert to fraction form
    1,218,391.61/1,681,380.82 = 667,142.24/x
  3. Step 3: Cross multiply
    1,218,391.61x = 1,681,380.82 × 667,142.24
  4. Step 4: Simplify right side
    1,218,391.61x = 1,121,720,172,711.41
  5. Step 5: Solve for x
    x = 1,121,720,172,711.41/1,218,391.61
  6. Step 6: Final answer
    x = 920,656.51

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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.