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Finding the Fourth Proportional to 3,000.76, 4,501.13 and 809.71

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Solution

The fourth proportional to 3,000.76, 4,501.13 and 809.71 is: 1,214.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,000.76 : 4,501.13 = 809.71 : x
  2. Step 2: Convert to fraction form
    3,000.76/4,501.13 = 809.71/x
  3. Step 3: Cross multiply
    3,000.76x = 4,501.13 × 809.71
  4. Step 4: Simplify right side
    3,000.76x = 3,644,609.97
  5. Step 5: Solve for x
    x = 3,644,609.97/3,000.76
  6. Step 6: Final answer
    x = 1,214.56

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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.