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Finding the Fourth Proportional to 996,759.12, 1,375,399 and 561,121.48

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Solution

The fourth proportional to 996,759.12, 1,375,399 and 561,121.48 is: 774,275.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    996,759.12 : 1,375,399 = 561,121.48 : x
  2. Step 2: Convert to fraction form
    996,759.12/1,375,399 = 561,121.48/x
  3. Step 3: Cross multiply
    996,759.12x = 1,375,399 × 561,121.48
  4. Step 4: Simplify right side
    996,759.12x = 771,765,922,470.52
  5. Step 5: Solve for x
    x = 771,765,922,470.52/996,759.12
  6. Step 6: Final answer
    x = 774,275.26

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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.