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Finding the Fourth Proportional to 486.04, 728.41 and 238.87

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Solution

The fourth proportional to 486.04, 728.41 and 238.87 is: 357.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    486.04 : 728.41 = 238.87 : x
  2. Step 2: Convert to fraction form
    486.04/728.41 = 238.87/x
  3. Step 3: Cross multiply
    486.04x = 728.41 × 238.87
  4. Step 4: Simplify right side
    486.04x = 173,991.65
  5. Step 5: Solve for x
    x = 173,991.65/486.04
  6. Step 6: Final answer
    x = 357.98

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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.