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Finding the Fourth Proportional to 644,493.80, 966,740.70 and 408,103.40

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Solution

The fourth proportional to 644,493.80, 966,740.70 and 408,103.40 is: 612,155.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,493.80 : 966,740.70 = 408,103.40 : x
  2. Step 2: Convert to fraction form
    644,493.80/966,740.70 = 408,103.40/x
  3. Step 3: Cross multiply
    644,493.80x = 966,740.70 × 408,103.40
  4. Step 4: Simplify right side
    644,493.80x = 394,530,166,588.38
  5. Step 5: Solve for x
    x = 394,530,166,588.38/644,493.80
  6. Step 6: Final answer
    x = 612,155.10

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1.5x scale

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.