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Finding the Fourth Proportional to 440.82, 660.96 and 258.12

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Solution

The fourth proportional to 440.82, 660.96 and 258.12 is: 387.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    440.82 : 660.96 = 258.12 : x
  2. Step 2: Convert to fraction form
    440.82/660.96 = 258.12/x
  3. Step 3: Cross multiply
    440.82x = 660.96 × 258.12
  4. Step 4: Simplify right side
    440.82x = 170,607.00
  5. Step 5: Solve for x
    x = 170,607.00/440.82
  6. Step 6: Final answer
    x = 387.02

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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.