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Finding the Fourth Proportional to 302.75, 417.72 and 178.37

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Solution

The fourth proportional to 302.75, 417.72 and 178.37 is: 246.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    302.75 : 417.72 = 178.37 : x
  2. Step 2: Convert to fraction form
    302.75/417.72 = 178.37/x
  3. Step 3: Cross multiply
    302.75x = 417.72 × 178.37
  4. Step 4: Simplify right side
    302.75x = 74,508.86
  5. Step 5: Solve for x
    x = 74,508.86/302.75
  6. Step 6: Final answer
    x = 246.11

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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.