Home / 2,108.18-2,909.33-1,224.05

Finding the Fourth Proportional to 2,108.18, 2,909.33 and 1,224.05

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Solution

The fourth proportional to 2,108.18, 2,909.33 and 1,224.05 is: 1,689.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,108.18 : 2,909.33 = 1,224.05 : x
  2. Step 2: Convert to fraction form
    2,108.18/2,909.33 = 1,224.05/x
  3. Step 3: Cross multiply
    2,108.18x = 2,909.33 × 1,224.05
  4. Step 4: Simplify right side
    2,108.18x = 3,561,156.20
  5. Step 5: Solve for x
    x = 3,561,156.20/2,108.18
  6. Step 6: Final answer
    x = 1,689.21

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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.