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Finding the Fourth Proportional to 408,029.40, 611,871.30 and 197,731.80

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Solution

The fourth proportional to 408,029.40, 611,871.30 and 197,731.80 is: 296,513.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,029.40 : 611,871.30 = 197,731.80 : x
  2. Step 2: Convert to fraction form
    408,029.40/611,871.30 = 197,731.80/x
  3. Step 3: Cross multiply
    408,029.40x = 611,871.30 × 197,731.80
  4. Step 4: Simplify right side
    408,029.40x = 120,986,413,517.34
  5. Step 5: Solve for x
    x = 120,986,413,517.34/408,029.40
  6. Step 6: Final answer
    x = 296,513.96

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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.