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Finding the Fourth Proportional to 297.90, 411.22 and 266.76

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Solution

The fourth proportional to 297.90, 411.22 and 266.76 is: 368.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    297.90 : 411.22 = 266.76 : x
  2. Step 2: Convert to fraction form
    297.90/411.22 = 266.76/x
  3. Step 3: Cross multiply
    297.90x = 411.22 × 266.76
  4. Step 4: Simplify right side
    297.90x = 109,696.38
  5. Step 5: Solve for x
    x = 109,696.38/297.90
  6. Step 6: Final answer
    x = 368.23

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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.