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Finding the Fourth Proportional to 302.79, 417.87 and 171.81

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Solution

The fourth proportional to 302.79, 417.87 and 171.81 is: 237.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    302.79 : 417.87 = 171.81 : x
  2. Step 2: Convert to fraction form
    302.79/417.87 = 171.81/x
  3. Step 3: Cross multiply
    302.79x = 417.87 × 171.81
  4. Step 4: Simplify right side
    302.79x = 71,792.16
  5. Step 5: Solve for x
    x = 71,792.16/302.79
  6. Step 6: Final answer
    x = 237.11

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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.