Home / 644,821.20-965,919.60-329,455.80

Finding the Fourth Proportional to 644,821.20, 965,919.60 and 329,455.80

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Solution

The fourth proportional to 644,821.20, 965,919.60 and 329,455.80 is: 493,513.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,821.20 : 965,919.60 = 329,455.80 : x
  2. Step 2: Convert to fraction form
    644,821.20/965,919.60 = 329,455.80/x
  3. Step 3: Cross multiply
    644,821.20x = 965,919.60 × 329,455.80
  4. Step 4: Simplify right side
    644,821.20x = 318,227,814,553.68
  5. Step 5: Solve for x
    x = 318,227,814,553.68/644,821.20
  6. Step 6: Final answer
    x = 493,513.26

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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.