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Finding the Fourth Proportional to 1,806.10, 2,707.05 and 830.15

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Solution

The fourth proportional to 1,806.10, 2,707.05 and 830.15 is: 1,244.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,806.10 : 2,707.05 = 830.15 : x
  2. Step 2: Convert to fraction form
    1,806.10/2,707.05 = 830.15/x
  3. Step 3: Cross multiply
    1,806.10x = 2,707.05 × 830.15
  4. Step 4: Simplify right side
    1,806.10x = 2,247,257.29
  5. Step 5: Solve for x
    x = 2,247,257.29/1,806.10
  6. Step 6: Final answer
    x = 1,244.26

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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.