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Finding the Fourth Proportional to 304.87, 420.81 and 173.89

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Solution

The fourth proportional to 304.87, 420.81 and 173.89 is: 240.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    304.87 : 420.81 = 173.89 : x
  2. Step 2: Convert to fraction form
    304.87/420.81 = 173.89/x
  3. Step 3: Cross multiply
    304.87x = 420.81 × 173.89
  4. Step 4: Simplify right side
    304.87x = 73,174.65
  5. Step 5: Solve for x
    x = 73,174.65/304.87
  6. Step 6: Final answer
    x = 240.02

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.