Home / 2,120.86-2,926.18-1,224.53

Finding the Fourth Proportional to 2,120.86, 2,926.18 and 1,224.53

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Solution

The fourth proportional to 2,120.86, 2,926.18 and 1,224.53 is: 1,689.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,120.86 : 2,926.18 = 1,224.53 : x
  2. Step 2: Convert to fraction form
    2,120.86/2,926.18 = 1,224.53/x
  3. Step 3: Cross multiply
    2,120.86x = 2,926.18 × 1,224.53
  4. Step 4: Simplify right side
    2,120.86x = 3,583,195.20
  5. Step 5: Solve for x
    x = 3,583,195.20/2,120.86
  6. Step 6: Final answer
    x = 1,689.50

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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.