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Finding the Fourth Proportional to 302.40, 417.38 and 171.42

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Solution

The fourth proportional to 302.40, 417.38 and 171.42 is: 236.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    302.40 : 417.38 = 171.42 : x
  2. Step 2: Convert to fraction form
    302.40/417.38 = 171.42/x
  3. Step 3: Cross multiply
    302.40x = 417.38 × 171.42
  4. Step 4: Simplify right side
    302.40x = 71,544.34
  5. Step 5: Solve for x
    x = 71,544.34/302.40
  6. Step 6: Final answer
    x = 236.59

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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.