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Finding the Fourth Proportional to 916,843.40, 1,375,265.10 and 580,920.20

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Solution

The fourth proportional to 916,843.40, 1,375,265.10 and 580,920.20 is: 871,380.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    916,843.40 : 1,375,265.10 = 580,920.20 : x
  2. Step 2: Convert to fraction form
    916,843.40/1,375,265.10 = 580,920.20/x
  3. Step 3: Cross multiply
    916,843.40x = 1,375,265.10 × 580,920.20
  4. Step 4: Simplify right side
    916,843.40x = 798,919,276,945.02
  5. Step 5: Solve for x
    x = 798,919,276,945.02/916,843.40
  6. Step 6: Final answer
    x = 871,380.30

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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.