Home / 722,406.12-996,928.92-400,121.88

Finding the Fourth Proportional to 722,406.12, 996,928.92 and 400,121.88

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Solution

The fourth proportional to 722,406.12, 996,928.92 and 400,121.88 is: 552,172.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    722,406.12 : 996,928.92 = 400,121.88 : x
  2. Step 2: Convert to fraction form
    722,406.12/996,928.92 = 400,121.88/x
  3. Step 3: Cross multiply
    722,406.12x = 996,928.92 × 400,121.88
  4. Step 4: Simplify right side
    722,406.12x = 398,893,073,696.77
  5. Step 5: Solve for x
    x = 398,893,073,696.77/722,406.12
  6. Step 6: Final answer
    x = 552,172.89

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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.