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Finding the Fourth Proportional to 426.74, 639.98 and 183.11

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Solution

The fourth proportional to 426.74, 639.98 and 183.11 is: 274.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    426.74 : 639.98 = 183.11 : x
  2. Step 2: Convert to fraction form
    426.74/639.98 = 183.11/x
  3. Step 3: Cross multiply
    426.74x = 639.98 × 183.11
  4. Step 4: Simplify right side
    426.74x = 117,185.82
  5. Step 5: Solve for x
    x = 117,185.82/426.74
  6. Step 6: Final answer
    x = 274.61

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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.