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Finding the Fourth Proportional to 458.44, 687.66 and 201.94

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Solution

The fourth proportional to 458.44, 687.66 and 201.94 is: 302.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    458.44 : 687.66 = 201.94 : x
  2. Step 2: Convert to fraction form
    458.44/687.66 = 201.94/x
  3. Step 3: Cross multiply
    458.44x = 687.66 × 201.94
  4. Step 4: Simplify right side
    458.44x = 138,864.34
  5. Step 5: Solve for x
    x = 138,864.34/458.44
  6. Step 6: Final answer
    x = 302.91

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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.