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Finding the Fourth Proportional to 4,123.70, 5,690.70 and 2,260.70

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Solution

The fourth proportional to 4,123.70, 5,690.70 and 2,260.70 is: 3,119.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,123.70 : 5,690.70 = 2,260.70 : x
  2. Step 2: Convert to fraction form
    4,123.70/5,690.70 = 2,260.70/x
  3. Step 3: Cross multiply
    4,123.70x = 5,690.70 × 2,260.70
  4. Step 4: Simplify right side
    4,123.70x = 12,864,937.04
  5. Step 5: Solve for x
    x = 12,864,937.04/4,123.70
  6. Step 6: Final answer
    x = 3,119.76

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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.