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Finding the Fourth Proportional to 1,099.02, 1,515.08 and 679.09

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Solution

The fourth proportional to 1,099.02, 1,515.08 and 679.09 is: 936.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,099.02 : 1,515.08 = 679.09 : x
  2. Step 2: Convert to fraction form
    1,099.02/1,515.08 = 679.09/x
  3. Step 3: Cross multiply
    1,099.02x = 1,515.08 × 679.09
  4. Step 4: Simplify right side
    1,099.02x = 1,028,875.68
  5. Step 5: Solve for x
    x = 1,028,875.68/1,099.02
  6. Step 6: Final answer
    x = 936.18

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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.