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Finding the Fourth Proportional to 2,251.70, 3,390.67 and 1,670.79

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Solution

The fourth proportional to 2,251.70, 3,390.67 and 1,670.79 is: 2,515.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,251.70 : 3,390.67 = 1,670.79 : x
  2. Step 2: Convert to fraction form
    2,251.70/3,390.67 = 1,670.79/x
  3. Step 3: Cross multiply
    2,251.70x = 3,390.67 × 1,670.79
  4. Step 4: Simplify right side
    2,251.70x = 5,665,097.53
  5. Step 5: Solve for x
    x = 5,665,097.53/2,251.70
  6. Step 6: Final answer
    x = 2,515.93

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.