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Finding the Fourth Proportional to 265,065.60, 397,306.80 and 115,280.40

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Solution

The fourth proportional to 265,065.60, 397,306.80 and 115,280.40 is: 172,793.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    265,065.60 : 397,306.80 = 115,280.40 : x
  2. Step 2: Convert to fraction form
    265,065.60/397,306.80 = 115,280.40/x
  3. Step 3: Cross multiply
    265,065.60x = 397,306.80 × 115,280.40
  4. Step 4: Simplify right side
    265,065.60x = 45,801,686,826.72
  5. Step 5: Solve for x
    x = 45,801,686,826.72/265,065.60
  6. Step 6: Final answer
    x = 172,793.78

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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.