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Finding the Fourth Proportional to 1,859.44, 2,789.63 and 1,312.69

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Solution

The fourth proportional to 1,859.44, 2,789.63 and 1,312.69 is: 1,969.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,859.44 : 2,789.63 = 1,312.69 : x
  2. Step 2: Convert to fraction form
    1,859.44/2,789.63 = 1,312.69/x
  3. Step 3: Cross multiply
    1,859.44x = 2,789.63 × 1,312.69
  4. Step 4: Simplify right side
    1,859.44x = 3,661,919.40
  5. Step 5: Solve for x
    x = 3,661,919.40/1,859.44
  6. Step 6: Final answer
    x = 1,969.37

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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.