Home / 2,129.12-3,193.83-742.28

Finding the Fourth Proportional to 2,129.12, 3,193.83 and 742.28

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Solution

The fourth proportional to 2,129.12, 3,193.83 and 742.28 is: 1,113.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,129.12 : 3,193.83 = 742.28 : x
  2. Step 2: Convert to fraction form
    2,129.12/3,193.83 = 742.28/x
  3. Step 3: Cross multiply
    2,129.12x = 3,193.83 × 742.28
  4. Step 4: Simplify right side
    2,129.12x = 2,370,718.13
  5. Step 5: Solve for x
    x = 2,370,718.13/2,129.12
  6. Step 6: Final answer
    x = 1,113.47

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.