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Finding the Fourth Proportional to 323,391.86, 443,049 and 311,270.94

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Solution

The fourth proportional to 323,391.86, 443,049 and 311,270.94 is: 426,443.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    323,391.86 : 443,049 = 311,270.94 : x
  2. Step 2: Convert to fraction form
    323,391.86/443,049 = 311,270.94/x
  3. Step 3: Cross multiply
    323,391.86x = 443,049 × 311,270.94
  4. Step 4: Simplify right side
    323,391.86x = 137,908,278,696.06
  5. Step 5: Solve for x
    x = 137,908,278,696.06/323,391.86
  6. Step 6: Final answer
    x = 426,443.26

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.