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Finding the Fourth Proportional to 321,117.89, 443,143.17 and 177,874.79

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Solution

The fourth proportional to 321,117.89, 443,143.17 and 177,874.79 is: 245,467.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,117.89 : 443,143.17 = 177,874.79 : x
  2. Step 2: Convert to fraction form
    321,117.89/443,143.17 = 177,874.79/x
  3. Step 3: Cross multiply
    321,117.89x = 443,143.17 × 177,874.79
  4. Step 4: Simplify right side
    321,117.89x = 78,823,996,087.97
  5. Step 5: Solve for x
    x = 78,823,996,087.97/321,117.89
  6. Step 6: Final answer
    x = 245,467.47

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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.