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Finding the Fourth Proportional to 296,447.20, 408,820.72 and 274,429.56

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Solution

The fourth proportional to 296,447.20, 408,820.72 and 274,429.56 is: 378,456.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    296,447.20 : 408,820.72 = 274,429.56 : x
  2. Step 2: Convert to fraction form
    296,447.20/408,820.72 = 274,429.56/x
  3. Step 3: Cross multiply
    296,447.20x = 408,820.72 × 274,429.56
  4. Step 4: Simplify right side
    296,447.20x = 112,192,490,308.48
  5. Step 5: Solve for x
    x = 112,192,490,308.48/296,447.20
  6. Step 6: Final answer
    x = 378,456.91

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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.