Home / 1,947.70-2,921.55-1,806.90

Finding the Fourth Proportional to 1,947.70, 2,921.55 and 1,806.90

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Solution

The fourth proportional to 1,947.70, 2,921.55 and 1,806.90 is: 2,710.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,947.70 : 2,921.55 = 1,806.90 : x
  2. Step 2: Convert to fraction form
    1,947.70/2,921.55 = 1,806.90/x
  3. Step 3: Cross multiply
    1,947.70x = 2,921.55 × 1,806.90
  4. Step 4: Simplify right side
    1,947.70x = 5,278,948.70
  5. Step 5: Solve for x
    x = 5,278,948.70/1,947.70
  6. Step 6: Final answer
    x = 2,710.35

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1.5x scale

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.