Home / 1,290,891.36-1,781,479.20-717,972.96

Finding the Fourth Proportional to 1,290,891.36, 1,781,479.20 and 717,972.96

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Solution

The fourth proportional to 1,290,891.36, 1,781,479.20 and 717,972.96 is: 990,830.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,290,891.36 : 1,781,479.20 = 717,972.96 : x
  2. Step 2: Convert to fraction form
    1,290,891.36/1,781,479.20 = 717,972.96/x
  3. Step 3: Cross multiply
    1,290,891.36x = 1,781,479.20 × 717,972.96
  4. Step 4: Simplify right side
    1,290,891.36x = 1,279,053,894,402.43
  5. Step 5: Solve for x
    x = 1,279,053,894,402.43/1,290,891.36
  6. Step 6: Final answer
    x = 990,830.01

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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.