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Finding the Fourth Proportional to 1,099.93, 1,650.49 and 613.25

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Solution

The fourth proportional to 1,099.93, 1,650.49 and 613.25 is: 920.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,099.93 : 1,650.49 = 613.25 : x
  2. Step 2: Convert to fraction form
    1,099.93/1,650.49 = 613.25/x
  3. Step 3: Cross multiply
    1,099.93x = 1,650.49 × 613.25
  4. Step 4: Simplify right side
    1,099.93x = 1,012,162.99
  5. Step 5: Solve for x
    x = 1,012,162.99/1,099.93
  6. Step 6: Final answer
    x = 920.21

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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.