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Finding the Fourth Proportional to 1,155.22, 1,733.72 and 806.29

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Solution

The fourth proportional to 1,155.22, 1,733.72 and 806.29 is: 1,210.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,155.22 : 1,733.72 = 806.29 : x
  2. Step 2: Convert to fraction form
    1,155.22/1,733.72 = 806.29/x
  3. Step 3: Cross multiply
    1,155.22x = 1,733.72 × 806.29
  4. Step 4: Simplify right side
    1,155.22x = 1,397,868.40
  5. Step 5: Solve for x
    x = 1,397,868.40/1,155.22
  6. Step 6: Final answer
    x = 1,210.05

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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.