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Finding the Fourth Proportional to 1,378.70, 2,066.97 and 944.54

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Solution

The fourth proportional to 1,378.70, 2,066.97 and 944.54 is: 1,416.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,378.70 : 2,066.97 = 944.54 : x
  2. Step 2: Convert to fraction form
    1,378.70/2,066.97 = 944.54/x
  3. Step 3: Cross multiply
    1,378.70x = 2,066.97 × 944.54
  4. Step 4: Simplify right side
    1,378.70x = 1,952,335.84
  5. Step 5: Solve for x
    x = 1,952,335.84/1,378.70
  6. Step 6: Final answer
    x = 1,416.07

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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.