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Finding the Fourth Proportional to 291.20, 437.28 and 281.92

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Solution

The fourth proportional to 291.20, 437.28 and 281.92 is: 423.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    291.20 : 437.28 = 281.92 : x
  2. Step 2: Convert to fraction form
    291.20/437.28 = 281.92/x
  3. Step 3: Cross multiply
    291.20x = 437.28 × 281.92
  4. Step 4: Simplify right side
    291.20x = 123,277.98
  5. Step 5: Solve for x
    x = 123,277.98/291.20
  6. Step 6: Final answer
    x = 423.34

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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.