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Finding the Fourth Proportional to 1,099.20, 1,516.62 and 626.98

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Solution

The fourth proportional to 1,099.20, 1,516.62 and 626.98 is: 865.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,099.20 : 1,516.62 = 626.98 : x
  2. Step 2: Convert to fraction form
    1,099.20/1,516.62 = 626.98/x
  3. Step 3: Cross multiply
    1,099.20x = 1,516.62 × 626.98
  4. Step 4: Simplify right side
    1,099.20x = 950,891.81
  5. Step 5: Solve for x
    x = 950,891.81/1,099.20
  6. Step 6: Final answer
    x = 865.07

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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.