Home / 2,165.13-2,988.17-1,221.11

Finding the Fourth Proportional to 2,165.13, 2,988.17 and 1,221.11

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Solution

The fourth proportional to 2,165.13, 2,988.17 and 1,221.11 is: 1,685.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,165.13 : 2,988.17 = 1,221.11 : x
  2. Step 2: Convert to fraction form
    2,165.13/2,988.17 = 1,221.11/x
  3. Step 3: Cross multiply
    2,165.13x = 2,988.17 × 1,221.11
  4. Step 4: Simplify right side
    2,165.13x = 3,648,878.16
  5. Step 5: Solve for x
    x = 3,648,878.16/2,165.13
  6. Step 6: Final answer
    x = 1,685.30

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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.