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Finding the Fourth Proportional to 302.77, 416.82 and 287.38

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Solution

The fourth proportional to 302.77, 416.82 and 287.38 is: 395.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    302.77 : 416.82 = 287.38 : x
  2. Step 2: Convert to fraction form
    302.77/416.82 = 287.38/x
  3. Step 3: Cross multiply
    302.77x = 416.82 × 287.38
  4. Step 4: Simplify right side
    302.77x = 119,785.73
  5. Step 5: Solve for x
    x = 119,785.73/302.77
  6. Step 6: Final answer
    x = 395.63

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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.