Home / 1,218,392.61-1,681,382.20-667,143.24

Finding the Fourth Proportional to 1,218,392.61, 1,681,382.20 and 667,143.24

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Solution

The fourth proportional to 1,218,392.61, 1,681,382.20 and 667,143.24 is: 920,657.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,218,392.61 : 1,681,382.20 = 667,143.24 : x
  2. Step 2: Convert to fraction form
    1,218,392.61/1,681,382.20 = 667,143.24/x
  3. Step 3: Cross multiply
    1,218,392.61x = 1,681,382.20 × 667,143.24
  4. Step 4: Simplify right side
    1,218,392.61x = 1,121,722,768,586.33
  5. Step 5: Solve for x
    x = 1,121,722,768,586.33/1,218,392.61
  6. Step 6: Final answer
    x = 920,657.89

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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.