Home / 428,123.60-641,494.20-270,069.20

Finding the Fourth Proportional to 428,123.60, 641,494.20 and 270,069.20

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Solution

The fourth proportional to 428,123.60, 641,494.20 and 270,069.20 is: 404,667.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,123.60 : 641,494.20 = 270,069.20 : x
  2. Step 2: Convert to fraction form
    428,123.60/641,494.20 = 270,069.20/x
  3. Step 3: Cross multiply
    428,123.60x = 641,494.20 × 270,069.20
  4. Step 4: Simplify right side
    428,123.60x = 173,247,825,398.64
  5. Step 5: Solve for x
    x = 173,247,825,398.64/428,123.60
  6. Step 6: Final answer
    x = 404,667.78

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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.