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Finding the Fourth Proportional to 5,679.40, 8,519.10 and 2,905.15

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Solution

The fourth proportional to 5,679.40, 8,519.10 and 2,905.15 is: 4,357.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,679.40 : 8,519.10 = 2,905.15 : x
  2. Step 2: Convert to fraction form
    5,679.40/8,519.10 = 2,905.15/x
  3. Step 3: Cross multiply
    5,679.40x = 8,519.10 × 2,905.15
  4. Step 4: Simplify right side
    5,679.40x = 24,749,263.37
  5. Step 5: Solve for x
    x = 24,749,263.37/5,679.40
  6. Step 6: Final answer
    x = 4,357.73

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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.