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Finding the Fourth Proportional to 397,138.82, 548,057.12 and 215,850.69

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Solution

The fourth proportional to 397,138.82, 548,057.12 and 215,850.69 is: 297,876.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    397,138.82 : 548,057.12 = 215,850.69 : x
  2. Step 2: Convert to fraction form
    397,138.82/548,057.12 = 215,850.69/x
  3. Step 3: Cross multiply
    397,138.82x = 548,057.12 × 215,850.69
  4. Step 4: Simplify right side
    397,138.82x = 118,298,506,432.16
  5. Step 5: Solve for x
    x = 118,298,506,432.16/397,138.82
  6. Step 6: Final answer
    x = 297,876.97

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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.