Home / 1,947.75-2,690.06-1,287.51

Finding the Fourth Proportional to 1,947.75, 2,690.06 and 1,287.51

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Solution

The fourth proportional to 1,947.75, 2,690.06 and 1,287.51 is: 1,778.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,947.75 : 2,690.06 = 1,287.51 : x
  2. Step 2: Convert to fraction form
    1,947.75/2,690.06 = 1,287.51/x
  3. Step 3: Cross multiply
    1,947.75x = 2,690.06 × 1,287.51
  4. Step 4: Simplify right side
    1,947.75x = 3,463,472.71
  5. Step 5: Solve for x
    x = 3,463,472.71/1,947.75
  6. Step 6: Final answer
    x = 1,778.19

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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.