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Finding the Fourth Proportional to 294.28, 405.28 and 211.24

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Solution

The fourth proportional to 294.28, 405.28 and 211.24 is: 290.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    294.28 : 405.28 = 211.24 : x
  2. Step 2: Convert to fraction form
    294.28/405.28 = 211.24/x
  3. Step 3: Cross multiply
    294.28x = 405.28 × 211.24
  4. Step 4: Simplify right side
    294.28x = 85,610.67
  5. Step 5: Solve for x
    x = 85,610.67/294.28
  6. Step 6: Final answer
    x = 290.92

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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.