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Finding the Fourth Proportional to 306.18, 422.91 and 266.76

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Solution

The fourth proportional to 306.18, 422.91 and 266.76 is: 368.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    306.18 : 422.91 = 266.76 : x
  2. Step 2: Convert to fraction form
    306.18/422.91 = 266.76/x
  3. Step 3: Cross multiply
    306.18x = 422.91 × 266.76
  4. Step 4: Simplify right side
    306.18x = 112,815.47
  5. Step 5: Solve for x
    x = 112,815.47/306.18
  6. Step 6: Final answer
    x = 368.46

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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.