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Finding the Fourth Proportional to 5,679.74, 8,503.64 and 4,288.70

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Solution

The fourth proportional to 5,679.74, 8,503.64 and 4,288.70 is: 6,420.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,679.74 : 8,503.64 = 4,288.70 : x
  2. Step 2: Convert to fraction form
    5,679.74/8,503.64 = 4,288.70/x
  3. Step 3: Cross multiply
    5,679.74x = 8,503.64 × 4,288.70
  4. Step 4: Simplify right side
    5,679.74x = 36,469,560.87
  5. Step 5: Solve for x
    x = 36,469,560.87/5,679.74
  6. Step 6: Final answer
    x = 6,420.99

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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.