Home / 1,290,627.60-1,780,992.92-717,655.47

Finding the Fourth Proportional to 1,290,627.60, 1,780,992.92 and 717,655.47

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Solution

The fourth proportional to 1,290,627.60, 1,780,992.92 and 717,655.47 is: 990,323.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,290,627.60 : 1,780,992.92 = 717,655.47 : x
  2. Step 2: Convert to fraction form
    1,290,627.60/1,780,992.92 = 717,655.47/x
  3. Step 3: Cross multiply
    1,290,627.60x = 1,780,992.92 × 717,655.47
  4. Step 4: Simplify right side
    1,290,627.60x = 1,278,139,307,481.00
  5. Step 5: Solve for x
    x = 1,278,139,307,481.00/1,290,627.60
  6. Step 6: Final answer
    x = 990,323.86

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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.