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Finding the Fourth Proportional to 420,660.64, 580,524.50 and 239,398.64

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Solution

The fourth proportional to 420,660.64, 580,524.50 and 239,398.64 is: 330,377.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,660.64 : 580,524.50 = 239,398.64 : x
  2. Step 2: Convert to fraction form
    420,660.64/580,524.50 = 239,398.64/x
  3. Step 3: Cross multiply
    420,660.64x = 580,524.50 × 239,398.64
  4. Step 4: Simplify right side
    420,660.64x = 138,976,775,786.68
  5. Step 5: Solve for x
    x = 138,976,775,786.68/420,660.64
  6. Step 6: Final answer
    x = 330,377.42

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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.