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Finding the Fourth Proportional to 294.40, 405.92 and 201.20

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Solution

The fourth proportional to 294.40, 405.92 and 201.20 is: 277.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    294.40 : 405.92 = 201.20 : x
  2. Step 2: Convert to fraction form
    294.40/405.92 = 201.20/x
  3. Step 3: Cross multiply
    294.40x = 405.92 × 201.20
  4. Step 4: Simplify right side
    294.40x = 81,669.58
  5. Step 5: Solve for x
    x = 81,669.58/294.40
  6. Step 6: Final answer
    x = 277.41

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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.