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Finding the Fourth Proportional to 302.13, 416.87 and 203.85

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Solution

The fourth proportional to 302.13, 416.87 and 203.85 is: 281.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    302.13 : 416.87 = 203.85 : x
  2. Step 2: Convert to fraction form
    302.13/416.87 = 203.85/x
  3. Step 3: Cross multiply
    302.13x = 416.87 × 203.85
  4. Step 4: Simplify right side
    302.13x = 84,977.93
  5. Step 5: Solve for x
    x = 84,977.93/302.13
  6. Step 6: Final answer
    x = 281.26

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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.