Home / 3,487.12-5,228.66-1,405.42

Finding the Fourth Proportional to 3,487.12, 5,228.66 and 1,405.42

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Solution

The fourth proportional to 3,487.12, 5,228.66 and 1,405.42 is: 2,107.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,487.12 : 5,228.66 = 1,405.42 : x
  2. Step 2: Convert to fraction form
    3,487.12/5,228.66 = 1,405.42/x
  3. Step 3: Cross multiply
    3,487.12x = 5,228.66 × 1,405.42
  4. Step 4: Simplify right side
    3,487.12x = 7,348,456.31
  5. Step 5: Solve for x
    x = 7,348,456.31/3,487.12
  6. Step 6: Final answer
    x = 2,107.31

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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.