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Finding the Fourth Proportional to 442,990.80, 664,486.20 and 396,334.80

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Solution

The fourth proportional to 442,990.80, 664,486.20 and 396,334.80 is: 594,502.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    442,990.80 : 664,486.20 = 396,334.80 : x
  2. Step 2: Convert to fraction form
    442,990.80/664,486.20 = 396,334.80/x
  3. Step 3: Cross multiply
    442,990.80x = 664,486.20 × 396,334.80
  4. Step 4: Simplify right side
    442,990.80x = 263,359,005,179.76
  5. Step 5: Solve for x
    x = 263,359,005,179.76/442,990.80
  6. Step 6: Final answer
    x = 594,502.20

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.