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Finding the Fourth Proportional to 442,913.80, 664,370.70 and 408,699.40

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Solution

The fourth proportional to 442,913.80, 664,370.70 and 408,699.40 is: 613,049.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    442,913.80 : 664,370.70 = 408,699.40 : x
  2. Step 2: Convert to fraction form
    442,913.80/664,370.70 = 408,699.40/x
  3. Step 3: Cross multiply
    442,913.80x = 664,370.70 × 408,699.40
  4. Step 4: Simplify right side
    442,913.80x = 271,527,906,467.58
  5. Step 5: Solve for x
    x = 271,527,906,467.58/442,913.80
  6. Step 6: Final answer
    x = 613,049.10

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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.