Home / 3,720.08-5,580.12-1,122.88

Finding the Fourth Proportional to 3,720.08, 5,580.12 and 1,122.88

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Solution

The fourth proportional to 3,720.08, 5,580.12 and 1,122.88 is: 1,684.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,720.08 : 5,580.12 = 1,122.88 : x
  2. Step 2: Convert to fraction form
    3,720.08/5,580.12 = 1,122.88/x
  3. Step 3: Cross multiply
    3,720.08x = 5,580.12 × 1,122.88
  4. Step 4: Simplify right side
    3,720.08x = 6,265,805.15
  5. Step 5: Solve for x
    x = 6,265,805.15/3,720.08
  6. Step 6: Final answer
    x = 1,684.32

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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.