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Finding the Fourth Proportional to 5,739.22, 7,920.10 and 3,221.32

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Solution

The fourth proportional to 5,739.22, 7,920.10 and 3,221.32 is: 4,445.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,739.22 : 7,920.10 = 3,221.32 : x
  2. Step 2: Convert to fraction form
    5,739.22/7,920.10 = 3,221.32/x
  3. Step 3: Cross multiply
    5,739.22x = 7,920.10 × 3,221.32
  4. Step 4: Simplify right side
    5,739.22x = 25,513,157.49
  5. Step 5: Solve for x
    x = 25,513,157.49/5,739.22
  6. Step 6: Final answer
    x = 4,445.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.