Home / 2,129.60-2,938.84-1,245.23

Finding the Fourth Proportional to 2,129.60, 2,938.84 and 1,245.23

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Solution

The fourth proportional to 2,129.60, 2,938.84 and 1,245.23 is: 1,718.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,129.60 : 2,938.84 = 1,245.23 : x
  2. Step 2: Convert to fraction form
    2,129.60/2,938.84 = 1,245.23/x
  3. Step 3: Cross multiply
    2,129.60x = 2,938.84 × 1,245.23
  4. Step 4: Simplify right side
    2,129.60x = 3,659,531.73
  5. Step 5: Solve for x
    x = 3,659,531.73/2,129.60
  6. Step 6: Final answer
    x = 1,718.41

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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.