Home / 827,328.48-1,240,672.87-321,821.20

Finding the Fourth Proportional to 827,328.48, 1,240,672.87 and 321,821.20

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Solution

The fourth proportional to 827,328.48, 1,240,672.87 and 321,821.20 is: 482,607.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    827,328.48 : 1,240,672.87 = 321,821.20 : x
  2. Step 2: Convert to fraction form
    827,328.48/1,240,672.87 = 321,821.20/x
  3. Step 3: Cross multiply
    827,328.48x = 1,240,672.87 × 321,821.20
  4. Step 4: Simplify right side
    827,328.48x = 399,274,834,689.08
  5. Step 5: Solve for x
    x = 399,274,834,689.08/827,328.48
  6. Step 6: Final answer
    x = 482,607.38

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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.