Home / 259,654.20-389,408.40-82,215.60

Finding the Fourth Proportional to 259,654.20, 389,408.40 and 82,215.60

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Solution

The fourth proportional to 259,654.20, 389,408.40 and 82,215.60 is: 123,300.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,654.20 : 389,408.40 = 82,215.60 : x
  2. Step 2: Convert to fraction form
    259,654.20/389,408.40 = 82,215.60/x
  3. Step 3: Cross multiply
    259,654.20x = 389,408.40 × 82,215.60
  4. Step 4: Simplify right side
    259,654.20x = 32,015,445,251.04
  5. Step 5: Solve for x
    x = 32,015,445,251.04/259,654.20
  6. Step 6: Final answer
    x = 123,300.32

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1.5x scale

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.