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Finding the Fourth Proportional to 305.16, 422.28 and 266.46

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Solution

The fourth proportional to 305.16, 422.28 and 266.46 is: 368.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    305.16 : 422.28 = 266.46 : x
  2. Step 2: Convert to fraction form
    305.16/422.28 = 266.46/x
  3. Step 3: Cross multiply
    305.16x = 422.28 × 266.46
  4. Step 4: Simplify right side
    305.16x = 112,520.73
  5. Step 5: Solve for x
    x = 112,520.73/305.16
  6. Step 6: Final answer
    x = 368.73

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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.