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Finding the Fourth Proportional to 302.82, 417.89 and 171.87

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Solution

The fourth proportional to 302.82, 417.89 and 171.87 is: 237.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    302.82 : 417.89 = 171.87 : x
  2. Step 2: Convert to fraction form
    302.82/417.89 = 171.87/x
  3. Step 3: Cross multiply
    302.82x = 417.89 × 171.87
  4. Step 4: Simplify right side
    302.82x = 71,819.81
  5. Step 5: Solve for x
    x = 71,819.81/302.82
  6. Step 6: Final answer
    x = 237.17

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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.