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Finding the Fourth Proportional to 3,636.40, 5,454.12 and 1,445.68

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Solution

The fourth proportional to 3,636.40, 5,454.12 and 1,445.68 is: 2,168.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,636.40 : 5,454.12 = 1,445.68 : x
  2. Step 2: Convert to fraction form
    3,636.40/5,454.12 = 1,445.68/x
  3. Step 3: Cross multiply
    3,636.40x = 5,454.12 × 1,445.68
  4. Step 4: Simplify right side
    3,636.40x = 7,884,912.20
  5. Step 5: Solve for x
    x = 7,884,912.20/3,636.40
  6. Step 6: Final answer
    x = 2,168.33

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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.