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Finding the Fourth Proportional to 291.16, 401.84 and 203.68

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Solution

The fourth proportional to 291.16, 401.84 and 203.68 is: 281.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    291.16 : 401.84 = 203.68 : x
  2. Step 2: Convert to fraction form
    291.16/401.84 = 203.68/x
  3. Step 3: Cross multiply
    291.16x = 401.84 × 203.68
  4. Step 4: Simplify right side
    291.16x = 81,846.77
  5. Step 5: Solve for x
    x = 81,846.77/291.16
  6. Step 6: Final answer
    x = 281.11

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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.