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Finding the Fourth Proportional to 3,486.64, 5,229.96 and 1,294.80

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Solution

The fourth proportional to 3,486.64, 5,229.96 and 1,294.80 is: 1,942.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,486.64 : 5,229.96 = 1,294.80 : x
  2. Step 2: Convert to fraction form
    3,486.64/5,229.96 = 1,294.80/x
  3. Step 3: Cross multiply
    3,486.64x = 5,229.96 × 1,294.80
  4. Step 4: Simplify right side
    3,486.64x = 6,771,752.21
  5. Step 5: Solve for x
    x = 6,771,752.21/3,486.64
  6. Step 6: Final answer
    x = 1,942.20

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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.