Home / 2,165.51-2,988.57-1,221.25

Finding the Fourth Proportional to 2,165.51, 2,988.57 and 1,221.25

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Solution

The fourth proportional to 2,165.51, 2,988.57 and 1,221.25 is: 1,685.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,165.51 : 2,988.57 = 1,221.25 : x
  2. Step 2: Convert to fraction form
    2,165.51/2,988.57 = 1,221.25/x
  3. Step 3: Cross multiply
    2,165.51x = 2,988.57 × 1,221.25
  4. Step 4: Simplify right side
    2,165.51x = 3,649,788.22
  5. Step 5: Solve for x
    x = 3,649,788.22/2,165.51
  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.