Home / 782,129.91-1,078,781.70-717,806.48

Finding the Fourth Proportional to 782,129.91, 1,078,781.70 and 717,806.48

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Solution

The fourth proportional to 782,129.91, 1,078,781.70 and 717,806.48 is: 990,061.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    782,129.91 : 1,078,781.70 = 717,806.48 : x
  2. Step 2: Convert to fraction form
    782,129.91/1,078,781.70 = 717,806.48/x
  3. Step 3: Cross multiply
    782,129.91x = 1,078,781.70 × 717,806.48
  4. Step 4: Simplify right side
    782,129.91x = 774,356,494,765.42
  5. Step 5: Solve for x
    x = 774,356,494,765.42/782,129.91
  6. Step 6: Final answer
    x = 990,061.22

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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.