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Finding the Fourth Proportional to 806.67, 1,210.19 and 792.90

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Solution

The fourth proportional to 806.67, 1,210.19 and 792.90 is: 1,189.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    806.67 : 1,210.19 = 792.90 : x
  2. Step 2: Convert to fraction form
    806.67/1,210.19 = 792.90/x
  3. Step 3: Cross multiply
    806.67x = 1,210.19 × 792.90
  4. Step 4: Simplify right side
    806.67x = 959,555.69
  5. Step 5: Solve for x
    x = 959,555.69/806.67
  6. Step 6: Final answer
    x = 1,189.53

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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.