Home / 1,288,564.12-1,778,169.78-715,641.20

Finding the Fourth Proportional to 1,288,564.12, 1,778,169.78 and 715,641.20

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Solution

The fourth proportional to 1,288,564.12, 1,778,169.78 and 715,641.20 is: 987,557.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,288,564.12 : 1,778,169.78 = 715,641.20 : x
  2. Step 2: Convert to fraction form
    1,288,564.12/1,778,169.78 = 715,641.20/x
  3. Step 3: Cross multiply
    1,288,564.12x = 1,778,169.78 × 715,641.20
  4. Step 4: Simplify right side
    1,288,564.12x = 1,272,531,555,162.94
  5. Step 5: Solve for x
    x = 1,272,531,555,162.94/1,288,564.12
  6. Step 6: Final answer
    x = 987,557.81

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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.