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Finding the Fourth Proportional to 302.55, 417.57 and 171.56

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Solution

The fourth proportional to 302.55, 417.57 and 171.56 is: 236.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    302.55 : 417.57 = 171.56 : x
  2. Step 2: Convert to fraction form
    302.55/417.57 = 171.56/x
  3. Step 3: Cross multiply
    302.55x = 417.57 × 171.56
  4. Step 4: Simplify right side
    302.55x = 71,638.31
  5. Step 5: Solve for x
    x = 71,638.31/302.55
  6. Step 6: Final answer
    x = 236.78

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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.