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Finding the Fourth Proportional to 5,311.70, 7,967.55 and 2,719.70

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Solution

The fourth proportional to 5,311.70, 7,967.55 and 2,719.70 is: 4,079.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,311.70 : 7,967.55 = 2,719.70 : x
  2. Step 2: Convert to fraction form
    5,311.70/7,967.55 = 2,719.70/x
  3. Step 3: Cross multiply
    5,311.70x = 7,967.55 × 2,719.70
  4. Step 4: Simplify right side
    5,311.70x = 21,669,345.74
  5. Step 5: Solve for x
    x = 21,669,345.74/5,311.70
  6. Step 6: Final answer
    x = 4,079.55

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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.