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Finding the Fourth Proportional to 2,073.08, 3,109.17 and 686.09

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Solution

The fourth proportional to 2,073.08, 3,109.17 and 686.09 is: 1,028.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,073.08 : 3,109.17 = 686.09 : x
  2. Step 2: Convert to fraction form
    2,073.08/3,109.17 = 686.09/x
  3. Step 3: Cross multiply
    2,073.08x = 3,109.17 × 686.09
  4. Step 4: Simplify right side
    2,073.08x = 2,133,154.90
  5. Step 5: Solve for x
    x = 2,133,154.90/2,073.08
  6. Step 6: Final answer
    x = 1,028.98

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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.