Home / 2,135.95-2,947.41-1,191.65

Finding the Fourth Proportional to 2,135.95, 2,947.41 and 1,191.65

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Solution

The fourth proportional to 2,135.95, 2,947.41 and 1,191.65 is: 1,644.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,135.95 : 2,947.41 = 1,191.65 : x
  2. Step 2: Convert to fraction form
    2,135.95/2,947.41 = 1,191.65/x
  3. Step 3: Cross multiply
    2,135.95x = 2,947.41 × 1,191.65
  4. Step 4: Simplify right side
    2,135.95x = 3,512,281.13
  5. Step 5: Solve for x
    x = 3,512,281.13/2,135.95
  6. Step 6: Final answer
    x = 1,644.36

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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.