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Finding the Fourth Proportional to 302.80, 417.87 and 171.81

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Solution

The fourth proportional to 302.80, 417.87 and 171.81 is: 237.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    302.80 : 417.87 = 171.81 : x
  2. Step 2: Convert to fraction form
    302.80/417.87 = 171.81/x
  3. Step 3: Cross multiply
    302.80x = 417.87 × 171.81
  4. Step 4: Simplify right side
    302.80x = 71,794.24
  5. Step 5: Solve for x
    x = 71,794.24/302.80
  6. Step 6: Final answer
    x = 237.10

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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.