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Finding the Fourth Proportional to 426.59, 640.11 and 183.05

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Solution

The fourth proportional to 426.59, 640.11 and 183.05 is: 274.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    426.59 : 640.11 = 183.05 : x
  2. Step 2: Convert to fraction form
    426.59/640.11 = 183.05/x
  3. Step 3: Cross multiply
    426.59x = 640.11 × 183.05
  4. Step 4: Simplify right side
    426.59x = 117,172.14
  5. Step 5: Solve for x
    x = 117,172.14/426.59
  6. Step 6: Final answer
    x = 274.67

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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.