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Finding the Fourth Proportional to 881,611.80, 1,321,251.30 and 781,301.40

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Solution

The fourth proportional to 881,611.80, 1,321,251.30 and 781,301.40 is: 1,170,918.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    881,611.80 : 1,321,251.30 = 781,301.40 : x
  2. Step 2: Convert to fraction form
    881,611.80/1,321,251.30 = 781,301.40/x
  3. Step 3: Cross multiply
    881,611.80x = 1,321,251.30 × 781,301.40
  4. Step 4: Simplify right side
    881,611.80x = 1,032,295,490,441.82
  5. Step 5: Solve for x
    x = 1,032,295,490,441.82/881,611.80
  6. Step 6: Final answer
    x = 1,170,918.41

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.