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Finding the Fourth Proportional to 304.48, 420.15 and 171.69

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Solution

The fourth proportional to 304.48, 420.15 and 171.69 is: 236.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    304.48 : 420.15 = 171.69 : x
  2. Step 2: Convert to fraction form
    304.48/420.15 = 171.69/x
  3. Step 3: Cross multiply
    304.48x = 420.15 × 171.69
  4. Step 4: Simplify right side
    304.48x = 72,134.62
  5. Step 5: Solve for x
    x = 72,134.62/304.48
  6. Step 6: Final answer
    x = 236.91

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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.