Home / 2,119.75-2,925.26-1,291.75

Finding the Fourth Proportional to 2,119.75, 2,925.26 and 1,291.75

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Solution

The fourth proportional to 2,119.75, 2,925.26 and 1,291.75 is: 1,782.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,119.75 : 2,925.26 = 1,291.75 : x
  2. Step 2: Convert to fraction form
    2,119.75/2,925.26 = 1,291.75/x
  3. Step 3: Cross multiply
    2,119.75x = 2,925.26 × 1,291.75
  4. Step 4: Simplify right side
    2,119.75x = 3,778,704.61
  5. Step 5: Solve for x
    x = 3,778,704.61/2,119.75
  6. Step 6: Final answer
    x = 1,782.62

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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.