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Finding the Fourth Proportional to 2,886.65, 4,330.20 and 806.67

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Solution

The fourth proportional to 2,886.65, 4,330.20 and 806.67 is: 1,210.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,886.65 : 4,330.20 = 806.67 : x
  2. Step 2: Convert to fraction form
    2,886.65/4,330.20 = 806.67/x
  3. Step 3: Cross multiply
    2,886.65x = 4,330.20 × 806.67
  4. Step 4: Simplify right side
    2,886.65x = 3,493,042.43
  5. Step 5: Solve for x
    x = 3,493,042.43/2,886.65
  6. Step 6: Final answer
    x = 1,210.07

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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.