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Finding the Fourth Proportional to 322.16, 481.76 and 260.16

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Solution

The fourth proportional to 322.16, 481.76 and 260.16 is: 389.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    322.16 : 481.76 = 260.16 : x
  2. Step 2: Convert to fraction form
    322.16/481.76 = 260.16/x
  3. Step 3: Cross multiply
    322.16x = 481.76 × 260.16
  4. Step 4: Simplify right side
    322.16x = 125,334.68
  5. Step 5: Solve for x
    x = 125,334.68/322.16
  6. Step 6: Final answer
    x = 389.04

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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.