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Finding the Fourth Proportional to 326.02, 488.46 and 261.76

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Solution

The fourth proportional to 326.02, 488.46 and 261.76 is: 392.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    326.02 : 488.46 = 261.76 : x
  2. Step 2: Convert to fraction form
    326.02/488.46 = 261.76/x
  3. Step 3: Cross multiply
    326.02x = 488.46 × 261.76
  4. Step 4: Simplify right side
    326.02x = 127,859.29
  5. Step 5: Solve for x
    x = 127,859.29/326.02
  6. Step 6: Final answer
    x = 392.18

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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.