Home / 1,290,230.20-1,780,625.40-717,323.68

Finding the Fourth Proportional to 1,290,230.20, 1,780,625.40 and 717,323.68

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Solution

The fourth proportional to 1,290,230.20, 1,780,625.40 and 717,323.68 is: 989,966.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,290,230.20 : 1,780,625.40 = 717,323.68 : x
  2. Step 2: Convert to fraction form
    1,290,230.20/1,780,625.40 = 717,323.68/x
  3. Step 3: Cross multiply
    1,290,230.20x = 1,780,625.40 × 717,323.68
  4. Step 4: Simplify right side
    1,290,230.20x = 1,277,284,764,629.47
  5. Step 5: Solve for x
    x = 1,277,284,764,629.47/1,290,230.20
  6. Step 6: Final answer
    x = 989,966.57

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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.