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Finding the Fourth Proportional to 428.00, 641.59 and 184.66

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Solution

The fourth proportional to 428.00, 641.59 and 184.66 is: 276.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    428.00 : 641.59 = 184.66 : x
  2. Step 2: Convert to fraction form
    428.00/641.59 = 184.66/x
  3. Step 3: Cross multiply
    428.00x = 641.59 × 184.66
  4. Step 4: Simplify right side
    428.00x = 118,473.94
  5. Step 5: Solve for x
    x = 118,473.94/428.00
  6. Step 6: Final answer
    x = 276.81

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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.