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Finding the Fourth Proportional to 322.24, 482.78 and 271.20

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Solution

The fourth proportional to 322.24, 482.78 and 271.20 is: 406.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    322.24 : 482.78 = 271.20 : x
  2. Step 2: Convert to fraction form
    322.24/482.78 = 271.20/x
  3. Step 3: Cross multiply
    322.24x = 482.78 × 271.20
  4. Step 4: Simplify right side
    322.24x = 130,929.94
  5. Step 5: Solve for x
    x = 130,929.94/322.24
  6. Step 6: Final answer
    x = 406.31

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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.