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Finding the Fourth Proportional to 3,000.92, 4,501.05 and 809.87

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Solution

The fourth proportional to 3,000.92, 4,501.05 and 809.87 is: 1,214.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,000.92 : 4,501.05 = 809.87 : x
  2. Step 2: Convert to fraction form
    3,000.92/4,501.05 = 809.87/x
  3. Step 3: Cross multiply
    3,000.92x = 4,501.05 × 809.87
  4. Step 4: Simplify right side
    3,000.92x = 3,645,242.86
  5. Step 5: Solve for x
    x = 3,645,242.86/3,000.92
  6. Step 6: Final answer
    x = 1,214.71

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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.