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Finding the Fourth Proportional to 397,195.78, 548,118.52 and 215,903.05

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Solution

The fourth proportional to 397,195.78, 548,118.52 and 215,903.05 is: 297,939.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    397,195.78 : 548,118.52 = 215,903.05 : x
  2. Step 2: Convert to fraction form
    397,195.78/548,118.52 = 215,903.05/x
  3. Step 3: Cross multiply
    397,195.78x = 548,118.52 × 215,903.05
  4. Step 4: Simplify right side
    397,195.78x = 118,340,456,409.38
  5. Step 5: Solve for x
    x = 118,340,456,409.38/397,195.78
  6. Step 6: Final answer
    x = 297,939.87

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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.