Home / 1,947.19-2,688.13-1,201.55

Finding the Fourth Proportional to 1,947.19, 2,688.13 and 1,201.55

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Solution

The fourth proportional to 1,947.19, 2,688.13 and 1,201.55 is: 1,658.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,947.19 : 2,688.13 = 1,201.55 : x
  2. Step 2: Convert to fraction form
    1,947.19/2,688.13 = 1,201.55/x
  3. Step 3: Cross multiply
    1,947.19x = 2,688.13 × 1,201.55
  4. Step 4: Simplify right side
    1,947.19x = 3,229,922.60
  5. Step 5: Solve for x
    x = 3,229,922.60/1,947.19
  6. Step 6: Final answer
    x = 1,658.76

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1.5x scale

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.