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Finding the Fourth Proportional to 321,718.88, 443,972.56 and 178,478.92

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Solution

The fourth proportional to 321,718.88, 443,972.56 and 178,478.92 is: 246,301.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,718.88 : 443,972.56 = 178,478.92 : x
  2. Step 2: Convert to fraction form
    321,718.88/443,972.56 = 178,478.92/x
  3. Step 3: Cross multiply
    321,718.88x = 443,972.56 × 178,478.92
  4. Step 4: Simplify right side
    321,718.88x = 79,239,743,018.44
  5. Step 5: Solve for x
    x = 79,239,743,018.44/321,718.88
  6. Step 6: Final answer
    x = 246,301.19

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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.