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Finding the Fourth Proportional to 275,399.60, 380,020.20 and 154,515.68

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Solution

The fourth proportional to 275,399.60, 380,020.20 and 154,515.68 is: 213,214.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    275,399.60 : 380,020.20 = 154,515.68 : x
  2. Step 2: Convert to fraction form
    275,399.60/380,020.20 = 154,515.68/x
  3. Step 3: Cross multiply
    275,399.60x = 380,020.20 × 154,515.68
  4. Step 4: Simplify right side
    275,399.60x = 58,719,079,616.74
  5. Step 5: Solve for x
    x = 58,719,079,616.74/275,399.60
  6. Step 6: Final answer
    x = 213,214.11

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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.