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Finding the Fourth Proportional to 302.49, 417.26 and 219.50

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Solution

The fourth proportional to 302.49, 417.26 and 219.50 is: 302.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    302.49 : 417.26 = 219.50 : x
  2. Step 2: Convert to fraction form
    302.49/417.26 = 219.50/x
  3. Step 3: Cross multiply
    302.49x = 417.26 × 219.50
  4. Step 4: Simplify right side
    302.49x = 91,588.57
  5. Step 5: Solve for x
    x = 91,588.57/302.49
  6. Step 6: Final answer
    x = 302.78

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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.