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Finding the Fourth Proportional to 5,579.57, 7,699.74 and 3,221.66

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Solution

The fourth proportional to 5,579.57, 7,699.74 and 3,221.66 is: 4,445.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,579.57 : 7,699.74 = 3,221.66 : x
  2. Step 2: Convert to fraction form
    5,579.57/7,699.74 = 3,221.66/x
  3. Step 3: Cross multiply
    5,579.57x = 7,699.74 × 3,221.66
  4. Step 4: Simplify right side
    5,579.57x = 24,805,905.87
  5. Step 5: Solve for x
    x = 24,805,905.87/5,579.57
  6. Step 6: Final answer
    x = 4,445.85

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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.