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Finding the Fourth Proportional to 3,000.66, 4,500.96 and 809.40

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Solution

The fourth proportional to 3,000.66, 4,500.96 and 809.40 is: 1,214.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,000.66 : 4,500.96 = 809.40 : x
  2. Step 2: Convert to fraction form
    3,000.66/4,500.96 = 809.40/x
  3. Step 3: Cross multiply
    3,000.66x = 4,500.96 × 809.40
  4. Step 4: Simplify right side
    3,000.66x = 3,643,077.02
  5. Step 5: Solve for x
    x = 3,643,077.02/3,000.66
  6. Step 6: Final answer
    x = 1,214.09

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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.