Home / 1,947.51-2,686.68-1,200.87

Finding the Fourth Proportional to 1,947.51, 2,686.68 and 1,200.87

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Solution

The fourth proportional to 1,947.51, 2,686.68 and 1,200.87 is: 1,656.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,947.51 : 2,686.68 = 1,200.87 : x
  2. Step 2: Convert to fraction form
    1,947.51/2,686.68 = 1,200.87/x
  3. Step 3: Cross multiply
    1,947.51x = 2,686.68 × 1,200.87
  4. Step 4: Simplify right side
    1,947.51x = 3,226,353.41
  5. Step 5: Solve for x
    x = 3,226,353.41/1,947.51
  6. Step 6: Final answer
    x = 1,656.66

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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.