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Finding the Fourth Proportional to 826,138.40, 1,239,207.60 and 794,645.60

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Solution

The fourth proportional to 826,138.40, 1,239,207.60 and 794,645.60 is: 1,191,968.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    826,138.40 : 1,239,207.60 = 794,645.60 : x
  2. Step 2: Convert to fraction form
    826,138.40/1,239,207.60 = 794,645.60/x
  3. Step 3: Cross multiply
    826,138.40x = 1,239,207.60 × 794,645.60
  4. Step 4: Simplify right side
    826,138.40x = 984,730,866,826.56
  5. Step 5: Solve for x
    x = 984,730,866,826.56/826,138.40
  6. Step 6: Final answer
    x = 1,191,968.40

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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.