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Finding the Fourth Proportional to 644,136.30, 966,204.45 and 407,745.90

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Solution

The fourth proportional to 644,136.30, 966,204.45 and 407,745.90 is: 611,618.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,136.30 : 966,204.45 = 407,745.90 : x
  2. Step 2: Convert to fraction form
    644,136.30/966,204.45 = 407,745.90/x
  3. Step 3: Cross multiply
    644,136.30x = 966,204.45 × 407,745.90
  4. Step 4: Simplify right side
    644,136.30x = 393,965,903,049.26
  5. Step 5: Solve for x
    x = 393,965,903,049.26/644,136.30
  6. Step 6: Final answer
    x = 611,618.85

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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.