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Finding the Fourth Proportional to 3,602.40, 5,403.60 and 3,213.60

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Solution

The fourth proportional to 3,602.40, 5,403.60 and 3,213.60 is: 4,820.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,602.40 : 5,403.60 = 3,213.60 : x
  2. Step 2: Convert to fraction form
    3,602.40/5,403.60 = 3,213.60/x
  3. Step 3: Cross multiply
    3,602.40x = 5,403.60 × 3,213.60
  4. Step 4: Simplify right side
    3,602.40x = 17,365,008.96
  5. Step 5: Solve for x
    x = 17,365,008.96/3,602.40
  6. Step 6: Final answer
    x = 4,820.40

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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.