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Finding the Fourth Proportional to 427.81, 641.36 and 184.15

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Solution

The fourth proportional to 427.81, 641.36 and 184.15 is: 276.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    427.81 : 641.36 = 184.15 : x
  2. Step 2: Convert to fraction form
    427.81/641.36 = 184.15/x
  3. Step 3: Cross multiply
    427.81x = 641.36 × 184.15
  4. Step 4: Simplify right side
    427.81x = 118,105.52
  5. Step 5: Solve for x
    x = 118,105.52/427.81
  6. Step 6: Final answer
    x = 276.07

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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.