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Finding the Fourth Proportional to 302.67, 418.05 and 215.19

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Solution

The fourth proportional to 302.67, 418.05 and 215.19 is: 297.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    302.67 : 418.05 = 215.19 : x
  2. Step 2: Convert to fraction form
    302.67/418.05 = 215.19/x
  3. Step 3: Cross multiply
    302.67x = 418.05 × 215.19
  4. Step 4: Simplify right side
    302.67x = 89,960.18
  5. Step 5: Solve for x
    x = 89,960.18/302.67
  6. Step 6: Final answer
    x = 297.22

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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.