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Finding the Fourth Proportional to 1,806.16, 2,709.89 and 709.92

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Solution

The fourth proportional to 1,806.16, 2,709.89 and 709.92 is: 1,065.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,806.16 : 2,709.89 = 709.92 : x
  2. Step 2: Convert to fraction form
    1,806.16/2,709.89 = 709.92/x
  3. Step 3: Cross multiply
    1,806.16x = 2,709.89 × 709.92
  4. Step 4: Simplify right side
    1,806.16x = 1,923,805.11
  5. Step 5: Solve for x
    x = 1,923,805.11/1,806.16
  6. Step 6: Final answer
    x = 1,065.14

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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.