Home / 644,530.40-965,629.20-394,920.80

Finding the Fourth Proportional to 644,530.40, 965,629.20 and 394,920.80

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Solution

The fourth proportional to 644,530.40, 965,629.20 and 394,920.80 is: 591,666.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,530.40 : 965,629.20 = 394,920.80 : x
  2. Step 2: Convert to fraction form
    644,530.40/965,629.20 = 394,920.80/x
  3. Step 3: Cross multiply
    644,530.40x = 965,629.20 × 394,920.80
  4. Step 4: Simplify right side
    644,530.40x = 381,347,056,167.36
  5. Step 5: Solve for x
    x = 381,347,056,167.36/644,530.40
  6. Step 6: Final answer
    x = 591,666.52

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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.