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Finding the Fourth Proportional to 3,405.56, 5,107.56 and 1,214.24

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Solution

The fourth proportional to 3,405.56, 5,107.56 and 1,214.24 is: 1,821.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,405.56 : 5,107.56 = 1,214.24 : x
  2. Step 2: Convert to fraction form
    3,405.56/5,107.56 = 1,214.24/x
  3. Step 3: Cross multiply
    3,405.56x = 5,107.56 × 1,214.24
  4. Step 4: Simplify right side
    3,405.56x = 6,201,803.65
  5. Step 5: Solve for x
    x = 6,201,803.65/3,405.56
  6. Step 6: Final answer
    x = 1,821.08

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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.