Home / 1,288,785.25-1,778,523.78-715,878.73

Finding the Fourth Proportional to 1,288,785.25, 1,778,523.78 and 715,878.73

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Solution

The fourth proportional to 1,288,785.25, 1,778,523.78 and 715,878.73 is: 987,912.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,288,785.25 : 1,778,523.78 = 715,878.73 : x
  2. Step 2: Convert to fraction form
    1,288,785.25/1,778,523.78 = 715,878.73/x
  3. Step 3: Cross multiply
    1,288,785.25x = 1,778,523.78 × 715,878.73
  4. Step 4: Simplify right side
    1,288,785.25x = 1,273,207,344,901.20
  5. Step 5: Solve for x
    x = 1,273,207,344,901.20/1,288,785.25
  6. Step 6: Final answer
    x = 987,912.72

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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.