Home / 2,135.84-2,947.50-1,178.78

Finding the Fourth Proportional to 2,135.84, 2,947.50 and 1,178.78

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Solution

The fourth proportional to 2,135.84, 2,947.50 and 1,178.78 is: 1,626.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,135.84 : 2,947.50 = 1,178.78 : x
  2. Step 2: Convert to fraction form
    2,135.84/2,947.50 = 1,178.78/x
  3. Step 3: Cross multiply
    2,135.84x = 2,947.50 × 1,178.78
  4. Step 4: Simplify right side
    2,135.84x = 3,474,454.05
  5. Step 5: Solve for x
    x = 3,474,454.05/2,135.84
  6. Step 6: Final answer
    x = 1,626.74

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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.