Home / 2,135.90-2,947.48-1,191.72

Finding the Fourth Proportional to 2,135.90, 2,947.48 and 1,191.72

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Solution

The fourth proportional to 2,135.90, 2,947.48 and 1,191.72 is: 1,644.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,135.90 : 2,947.48 = 1,191.72 : x
  2. Step 2: Convert to fraction form
    2,135.90/2,947.48 = 1,191.72/x
  3. Step 3: Cross multiply
    2,135.90x = 2,947.48 × 1,191.72
  4. Step 4: Simplify right side
    2,135.90x = 3,512,570.87
  5. Step 5: Solve for x
    x = 3,512,570.87/2,135.90
  6. Step 6: Final answer
    x = 1,644.54

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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.