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Finding the Fourth Proportional to 1,969.77, 2,956.45 and 1,240.65

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Solution

The fourth proportional to 1,969.77, 2,956.45 and 1,240.65 is: 1,862.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,969.77 : 2,956.45 = 1,240.65 : x
  2. Step 2: Convert to fraction form
    1,969.77/2,956.45 = 1,240.65/x
  3. Step 3: Cross multiply
    1,969.77x = 2,956.45 × 1,240.65
  4. Step 4: Simplify right side
    1,969.77x = 3,667,919.69
  5. Step 5: Solve for x
    x = 3,667,919.69/1,969.77
  6. Step 6: Final answer
    x = 1,862.11

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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.