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Finding the Fourth Proportional to 3,000.92, 4,501.20 and 809.60

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Solution

The fourth proportional to 3,000.92, 4,501.20 and 809.60 is: 1,214.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,000.92 : 4,501.20 = 809.60 : x
  2. Step 2: Convert to fraction form
    3,000.92/4,501.20 = 809.60/x
  3. Step 3: Cross multiply
    3,000.92x = 4,501.20 × 809.60
  4. Step 4: Simplify right side
    3,000.92x = 3,644,171.52
  5. Step 5: Solve for x
    x = 3,644,171.52/3,000.92
  6. Step 6: Final answer
    x = 1,214.35

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1.5x scale

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.