Home / 1,288,781.76-1,778,469.36-715,858.56

Finding the Fourth Proportional to 1,288,781.76, 1,778,469.36 and 715,858.56

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Solution

The fourth proportional to 1,288,781.76, 1,778,469.36 and 715,858.56 is: 987,857.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,288,781.76 : 1,778,469.36 = 715,858.56 : x
  2. Step 2: Convert to fraction form
    1,288,781.76/1,778,469.36 = 715,858.56/x
  3. Step 3: Cross multiply
    1,288,781.76x = 1,778,469.36 × 715,858.56
  4. Step 4: Simplify right side
    1,288,781.76x = 1,273,132,515,053.72
  5. Step 5: Solve for x
    x = 1,273,132,515,053.72/1,288,781.76
  6. Step 6: Final answer
    x = 987,857.34

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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.