Home / 2,135.91-2,947.32-1,191.60

Finding the Fourth Proportional to 2,135.91, 2,947.32 and 1,191.60

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Solution

The fourth proportional to 2,135.91, 2,947.32 and 1,191.60 is: 1,644.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,135.91 : 2,947.32 = 1,191.60 : x
  2. Step 2: Convert to fraction form
    2,135.91/2,947.32 = 1,191.60/x
  3. Step 3: Cross multiply
    2,135.91x = 2,947.32 × 1,191.60
  4. Step 4: Simplify right side
    2,135.91x = 3,512,026.51
  5. Step 5: Solve for x
    x = 3,512,026.51/2,135.91
  6. Step 6: Final answer
    x = 1,644.28

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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.