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Finding the Fourth Proportional to 1,099.01, 1,516.91 and 679.74

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Solution

The fourth proportional to 1,099.01, 1,516.91 and 679.74 is: 938.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,099.01 : 1,516.91 = 679.74 : x
  2. Step 2: Convert to fraction form
    1,099.01/1,516.91 = 679.74/x
  3. Step 3: Cross multiply
    1,099.01x = 1,516.91 × 679.74
  4. Step 4: Simplify right side
    1,099.01x = 1,031,101.00
  5. Step 5: Solve for x
    x = 1,031,101.00/1,099.01
  6. Step 6: Final answer
    x = 938.21

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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.