Home / 2,122.50-2,929.32-1,191

Finding the Fourth Proportional to 2,122.50, 2,929.32 and 1,191

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Solution

The fourth proportional to 2,122.50, 2,929.32 and 1,191 is: 1,643.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,122.50 : 2,929.32 = 1,191 : x
  2. Step 2: Convert to fraction form
    2,122.50/2,929.32 = 1,191/x
  3. Step 3: Cross multiply
    2,122.50x = 2,929.32 × 1,191
  4. Step 4: Simplify right side
    2,122.50x = 3,488,820.12
  5. Step 5: Solve for x
    x = 3,488,820.12/2,122.50
  6. Step 6: Final answer
    x = 1,643.73

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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.