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Finding the Fourth Proportional to 1,949.79, 2,690.76 and 1,065.68

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Solution

The fourth proportional to 1,949.79, 2,690.76 and 1,065.68 is: 1,470.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,949.79 : 2,690.76 = 1,065.68 : x
  2. Step 2: Convert to fraction form
    1,949.79/2,690.76 = 1,065.68/x
  3. Step 3: Cross multiply
    1,949.79x = 2,690.76 × 1,065.68
  4. Step 4: Simplify right side
    1,949.79x = 2,867,489.12
  5. Step 5: Solve for x
    x = 2,867,489.12/1,949.79
  6. Step 6: Final answer
    x = 1,470.67

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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.