Home / 3,480.28-5,220.80-1,140.20

Finding the Fourth Proportional to 3,480.28, 5,220.80 and 1,140.20

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Solution

The fourth proportional to 3,480.28, 5,220.80 and 1,140.20 is: 1,710.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,480.28 : 5,220.80 = 1,140.20 : x
  2. Step 2: Convert to fraction form
    3,480.28/5,220.80 = 1,140.20/x
  3. Step 3: Cross multiply
    3,480.28x = 5,220.80 × 1,140.20
  4. Step 4: Simplify right side
    3,480.28x = 5,952,756.16
  5. Step 5: Solve for x
    x = 5,952,756.16/3,480.28
  6. Step 6: Final answer
    x = 1,710.42

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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.