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Finding the Fourth Proportional to 427.80, 641.73 and 184.26

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Solution

The fourth proportional to 427.80, 641.73 and 184.26 is: 276.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    427.80 : 641.73 = 184.26 : x
  2. Step 2: Convert to fraction form
    427.80/641.73 = 184.26/x
  3. Step 3: Cross multiply
    427.80x = 641.73 × 184.26
  4. Step 4: Simplify right side
    427.80x = 118,244.25
  5. Step 5: Solve for x
    x = 118,244.25/427.80
  6. Step 6: Final answer
    x = 276.40

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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.