Home / 1,290,657.33-1,781,033.76-717,685.20

Finding the Fourth Proportional to 1,290,657.33, 1,781,033.76 and 717,685.20

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Solution

The fourth proportional to 1,290,657.33, 1,781,033.76 and 717,685.20 is: 990,364.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,290,657.33 : 1,781,033.76 = 717,685.20 : x
  2. Step 2: Convert to fraction form
    1,290,657.33/1,781,033.76 = 717,685.20/x
  3. Step 3: Cross multiply
    1,290,657.33x = 1,781,033.76 × 717,685.20
  4. Step 4: Simplify right side
    1,290,657.33x = 1,278,221,570,252.35
  5. Step 5: Solve for x
    x = 1,278,221,570,252.35/1,290,657.33
  6. Step 6: Final answer
    x = 990,364.79

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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.