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Finding the Fourth Proportional to 361.11, 542.22 and 291.91

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Solution

The fourth proportional to 361.11, 542.22 and 291.91 is: 438.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    361.11 : 542.22 = 291.91 : x
  2. Step 2: Convert to fraction form
    361.11/542.22 = 291.91/x
  3. Step 3: Cross multiply
    361.11x = 542.22 × 291.91
  4. Step 4: Simplify right side
    361.11x = 158,281.85
  5. Step 5: Solve for x
    x = 158,281.85/361.11
  6. Step 6: Final answer
    x = 438.32

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.