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Finding the Fourth Proportional to 291.79, 437.61 and 199.31

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Solution

The fourth proportional to 291.79, 437.61 and 199.31 is: 298.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    291.79 : 437.61 = 199.31 : x
  2. Step 2: Convert to fraction form
    291.79/437.61 = 199.31/x
  3. Step 3: Cross multiply
    291.79x = 437.61 × 199.31
  4. Step 4: Simplify right side
    291.79x = 87,220.05
  5. Step 5: Solve for x
    x = 87,220.05/291.79
  6. Step 6: Final answer
    x = 298.91

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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.