Home / 811,705.71-1,120,604.36-489,497.43

Finding the Fourth Proportional to 811,705.71, 1,120,604.36 and 489,497.43

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Solution

The fourth proportional to 811,705.71, 1,120,604.36 and 489,497.43 is: 675,778.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    811,705.71 : 1,120,604.36 = 489,497.43 : x
  2. Step 2: Convert to fraction form
    811,705.71/1,120,604.36 = 489,497.43/x
  3. Step 3: Cross multiply
    811,705.71x = 1,120,604.36 × 489,497.43
  4. Step 4: Simplify right side
    811,705.71x = 548,532,951,819.31
  5. Step 5: Solve for x
    x = 548,532,951,819.31/811,705.71
  6. Step 6: Final answer
    x = 675,778.11

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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.