Home / 2,165.52-2,988.39-1,221.33

Finding the Fourth Proportional to 2,165.52, 2,988.39 and 1,221.33

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Solution

The fourth proportional to 2,165.52, 2,988.39 and 1,221.33 is: 1,685.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,165.52 : 2,988.39 = 1,221.33 : x
  2. Step 2: Convert to fraction form
    2,165.52/2,988.39 = 1,221.33/x
  3. Step 3: Cross multiply
    2,165.52x = 2,988.39 × 1,221.33
  4. Step 4: Simplify right side
    2,165.52x = 3,649,810.36
  5. Step 5: Solve for x
    x = 3,649,810.36/2,165.52
  6. Step 6: Final answer
    x = 1,685.42

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1.5x scale

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.