Home / 2,165.37-2,988.09-1,221.32

Finding the Fourth Proportional to 2,165.37, 2,988.09 and 1,221.32

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Solution

The fourth proportional to 2,165.37, 2,988.09 and 1,221.32 is: 1,685.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,165.37 : 2,988.09 = 1,221.32 : x
  2. Step 2: Convert to fraction form
    2,165.37/2,988.09 = 1,221.32/x
  3. Step 3: Cross multiply
    2,165.37x = 2,988.09 × 1,221.32
  4. Step 4: Simplify right side
    2,165.37x = 3,649,399.14
  5. Step 5: Solve for x
    x = 3,649,399.14/2,165.37
  6. Step 6: Final answer
    x = 1,685.35

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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.