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Finding the Fourth Proportional to 1,099.76, 1,647.44 and 667.76

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Solution

The fourth proportional to 1,099.76, 1,647.44 and 667.76 is: 1,000.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,099.76 : 1,647.44 = 667.76 : x
  2. Step 2: Convert to fraction form
    1,099.76/1,647.44 = 667.76/x
  3. Step 3: Cross multiply
    1,099.76x = 1,647.44 × 667.76
  4. Step 4: Simplify right side
    1,099.76x = 1,100,094.53
  5. Step 5: Solve for x
    x = 1,100,094.53/1,099.76
  6. Step 6: Final answer
    x = 1,000.30

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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.