Home / 827,143.75-1,240,792.32-321,743.24

Finding the Fourth Proportional to 827,143.75, 1,240,792.32 and 321,743.24

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Solution

The fourth proportional to 827,143.75, 1,240,792.32 and 321,743.24 is: 482,644.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    827,143.75 : 1,240,792.32 = 321,743.24 : x
  2. Step 2: Convert to fraction form
    827,143.75/1,240,792.32 = 321,743.24/x
  3. Step 3: Cross multiply
    827,143.75x = 1,240,792.32 × 321,743.24
  4. Step 4: Simplify right side
    827,143.75x = 399,216,540,859.46
  5. Step 5: Solve for x
    x = 399,216,540,859.46/827,143.75
  6. Step 6: Final answer
    x = 482,644.69

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Double scale
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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.