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Finding the Fourth Proportional to 321.84, 444.66 and 256.92

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Solution

The fourth proportional to 321.84, 444.66 and 256.92 is: 354.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    321.84 : 444.66 = 256.92 : x
  2. Step 2: Convert to fraction form
    321.84/444.66 = 256.92/x
  3. Step 3: Cross multiply
    321.84x = 444.66 × 256.92
  4. Step 4: Simplify right side
    321.84x = 114,242.05
  5. Step 5: Solve for x
    x = 114,242.05/321.84
  6. Step 6: Final answer
    x = 354.97

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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.