Home / 465,821.52-643,321.56-321,003.76

Finding the Fourth Proportional to 465,821.52, 643,321.56 and 321,003.76

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Solution

The fourth proportional to 465,821.52, 643,321.56 and 321,003.76 is: 443,321.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    465,821.52 : 643,321.56 = 321,003.76 : x
  2. Step 2: Convert to fraction form
    465,821.52/643,321.56 = 321,003.76/x
  3. Step 3: Cross multiply
    465,821.52x = 643,321.56 × 321,003.76
  4. Step 4: Simplify right side
    465,821.52x = 206,508,639,649.07
  5. Step 5: Solve for x
    x = 206,508,639,649.07/465,821.52
  6. Step 6: Final answer
    x = 443,321.38

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.