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Finding the Fourth Proportional to 3,655.80, 5,480.24 and 1,188.90

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Solution

The fourth proportional to 3,655.80, 5,480.24 and 1,188.90 is: 1,782.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,655.80 : 5,480.24 = 1,188.90 : x
  2. Step 2: Convert to fraction form
    3,655.80/5,480.24 = 1,188.90/x
  3. Step 3: Cross multiply
    3,655.80x = 5,480.24 × 1,188.90
  4. Step 4: Simplify right side
    3,655.80x = 6,515,451.39
  5. Step 5: Solve for x
    x = 6,515,451.39/3,655.80
  6. Step 6: Final answer
    x = 1,782.22

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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.