Home / 644,628.40-966,136.20-329,210.80

Finding the Fourth Proportional to 644,628.40, 966,136.20 and 329,210.80

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Solution

The fourth proportional to 644,628.40, 966,136.20 and 329,210.80 is: 493,404.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,628.40 : 966,136.20 = 329,210.80 : x
  2. Step 2: Convert to fraction form
    644,628.40/966,136.20 = 329,210.80/x
  3. Step 3: Cross multiply
    644,628.40x = 966,136.20 × 329,210.80
  4. Step 4: Simplify right side
    644,628.40x = 318,062,471,310.96
  5. Step 5: Solve for x
    x = 318,062,471,310.96/644,628.40
  6. Step 6: Final answer
    x = 493,404.37

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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.