Home / 3,620.76-5,430.12-1,399.08

Finding the Fourth Proportional to 3,620.76, 5,430.12 and 1,399.08

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Solution

The fourth proportional to 3,620.76, 5,430.12 and 1,399.08 is: 2,098.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,620.76 : 5,430.12 = 1,399.08 : x
  2. Step 2: Convert to fraction form
    3,620.76/5,430.12 = 1,399.08/x
  3. Step 3: Cross multiply
    3,620.76x = 5,430.12 × 1,399.08
  4. Step 4: Simplify right side
    3,620.76x = 7,597,172.29
  5. Step 5: Solve for x
    x = 7,597,172.29/3,620.76
  6. Step 6: Final answer
    x = 2,098.23

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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.