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Finding the Fourth Proportional to 3,405.12, 5,107.68 and 940.29

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Solution

The fourth proportional to 3,405.12, 5,107.68 and 940.29 is: 1,410.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,405.12 : 5,107.68 = 940.29 : x
  2. Step 2: Convert to fraction form
    3,405.12/5,107.68 = 940.29/x
  3. Step 3: Cross multiply
    3,405.12x = 5,107.68 × 940.29
  4. Step 4: Simplify right side
    3,405.12x = 4,802,700.43
  5. Step 5: Solve for x
    x = 4,802,700.43/3,405.12
  6. Step 6: Final answer
    x = 1,410.44

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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.