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Finding the Fourth Proportional to 427.90, 641.96 and 184.30

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Solution

The fourth proportional to 427.90, 641.96 and 184.30 is: 276.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    427.90 : 641.96 = 184.30 : x
  2. Step 2: Convert to fraction form
    427.90/641.96 = 184.30/x
  3. Step 3: Cross multiply
    427.90x = 641.96 × 184.30
  4. Step 4: Simplify right side
    427.90x = 118,313.23
  5. Step 5: Solve for x
    x = 118,313.23/427.90
  6. Step 6: Final answer
    x = 276.50

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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.