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Finding the Fourth Proportional to 397,191.78, 548,125.03 and 215,903.71

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Solution

The fourth proportional to 397,191.78, 548,125.03 and 215,903.71 is: 297,947.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    397,191.78 : 548,125.03 = 215,903.71 : x
  2. Step 2: Convert to fraction form
    397,191.78/548,125.03 = 215,903.71/x
  3. Step 3: Cross multiply
    397,191.78x = 548,125.03 × 215,903.71
  4. Step 4: Simplify right side
    397,191.78x = 118,342,224,178.24
  5. Step 5: Solve for x
    x = 118,342,224,178.24/397,191.78
  6. Step 6: Final answer
    x = 297,947.31

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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.