Home / 3,405.40-5,109.36-1,459.12

Finding the Fourth Proportional to 3,405.40, 5,109.36 and 1,459.12

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Solution

The fourth proportional to 3,405.40, 5,109.36 and 1,459.12 is: 2,189.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,405.40 : 5,109.36 = 1,459.12 : x
  2. Step 2: Convert to fraction form
    3,405.40/5,109.36 = 1,459.12/x
  3. Step 3: Cross multiply
    3,405.40x = 5,109.36 × 1,459.12
  4. Step 4: Simplify right side
    3,405.40x = 7,455,169.36
  5. Step 5: Solve for x
    x = 7,455,169.36/3,405.40
  6. Step 6: Final answer
    x = 2,189.22

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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.