Home / 2,115.52-2,919.66-1,219.47

Finding the Fourth Proportional to 2,115.52, 2,919.66 and 1,219.47

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Solution

The fourth proportional to 2,115.52, 2,919.66 and 1,219.47 is: 1,683.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,115.52 : 2,919.66 = 1,219.47 : x
  2. Step 2: Convert to fraction form
    2,115.52/2,919.66 = 1,219.47/x
  3. Step 3: Cross multiply
    2,115.52x = 2,919.66 × 1,219.47
  4. Step 4: Simplify right side
    2,115.52x = 3,560,437.78
  5. Step 5: Solve for x
    x = 3,560,437.78/2,115.52
  6. Step 6: Final answer
    x = 1,683.01

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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.