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Finding the Fourth Proportional to 3,745.50, 5,615.20 and 1,404.20

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Solution

The fourth proportional to 3,745.50, 5,615.20 and 1,404.20 is: 2,105.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,745.50 : 5,615.20 = 1,404.20 : x
  2. Step 2: Convert to fraction form
    3,745.50/5,615.20 = 1,404.20/x
  3. Step 3: Cross multiply
    3,745.50x = 5,615.20 × 1,404.20
  4. Step 4: Simplify right side
    3,745.50x = 7,884,863.84
  5. Step 5: Solve for x
    x = 7,884,863.84/3,745.50
  6. Step 6: Final answer
    x = 2,105.16

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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.