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Finding the Fourth Proportional to 378,444.80, 522,245.28 and 208,679.36

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Solution

The fourth proportional to 378,444.80, 522,245.28 and 208,679.36 is: 287,972.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,444.80 : 522,245.28 = 208,679.36 : x
  2. Step 2: Convert to fraction form
    378,444.80/522,245.28 = 208,679.36/x
  3. Step 3: Cross multiply
    378,444.80x = 522,245.28 × 208,679.36
  4. Step 4: Simplify right side
    378,444.80x = 108,981,810,793.42
  5. Step 5: Solve for x
    x = 108,981,810,793.42/378,444.80
  6. Step 6: Final answer
    x = 287,972.81

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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.