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Finding the Fourth Proportional to 442.40, 610.56 and 276.55

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Solution

The fourth proportional to 442.40, 610.56 and 276.55 is: 381.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    442.40 : 610.56 = 276.55 : x
  2. Step 2: Convert to fraction form
    442.40/610.56 = 276.55/x
  3. Step 3: Cross multiply
    442.40x = 610.56 × 276.55
  4. Step 4: Simplify right side
    442.40x = 168,850.37
  5. Step 5: Solve for x
    x = 168,850.37/442.40
  6. Step 6: Final answer
    x = 381.67

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.