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Finding the Fourth Proportional to 3,679.98, 5,519.43 and 1,214.86

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Solution

The fourth proportional to 3,679.98, 5,519.43 and 1,214.86 is: 1,822.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,679.98 : 5,519.43 = 1,214.86 : x
  2. Step 2: Convert to fraction form
    3,679.98/5,519.43 = 1,214.86/x
  3. Step 3: Cross multiply
    3,679.98x = 5,519.43 × 1,214.86
  4. Step 4: Simplify right side
    3,679.98x = 6,705,334.73
  5. Step 5: Solve for x
    x = 6,705,334.73/3,679.98
  6. Step 6: Final answer
    x = 1,822.11

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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.