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Finding the Fourth Proportional to 420,297.75, 580,010.90 and 269,394.75

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Solution

The fourth proportional to 420,297.75, 580,010.90 and 269,394.75 is: 371,764.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,297.75 : 580,010.90 = 269,394.75 : x
  2. Step 2: Convert to fraction form
    420,297.75/580,010.90 = 269,394.75/x
  3. Step 3: Cross multiply
    420,297.75x = 580,010.90 × 269,394.75
  4. Step 4: Simplify right side
    420,297.75x = 156,251,890,055.80
  5. Step 5: Solve for x
    x = 156,251,890,055.80/420,297.75
  6. Step 6: Final answer
    x = 371,764.76

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.