Home / 1,947.18-2,686.34-1,238.84

Finding the Fourth Proportional to 1,947.18, 2,686.34 and 1,238.84

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Solution

The fourth proportional to 1,947.18, 2,686.34 and 1,238.84 is: 1,709.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,947.18 : 2,686.34 = 1,238.84 : x
  2. Step 2: Convert to fraction form
    1,947.18/2,686.34 = 1,238.84/x
  3. Step 3: Cross multiply
    1,947.18x = 2,686.34 × 1,238.84
  4. Step 4: Simplify right side
    1,947.18x = 3,327,945.18
  5. Step 5: Solve for x
    x = 3,327,945.18/1,947.18
  6. Step 6: Final answer
    x = 1,709.11

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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.