Home / 2,074.12-3,111.20-613.28

Finding the Fourth Proportional to 2,074.12, 3,111.20 and 613.28

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Solution

The fourth proportional to 2,074.12, 3,111.20 and 613.28 is: 919.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,074.12 : 3,111.20 = 613.28 : x
  2. Step 2: Convert to fraction form
    2,074.12/3,111.20 = 613.28/x
  3. Step 3: Cross multiply
    2,074.12x = 3,111.20 × 613.28
  4. Step 4: Simplify right side
    2,074.12x = 1,908,036.74
  5. Step 5: Solve for x
    x = 1,908,036.74/2,074.12
  6. Step 6: Final answer
    x = 919.93

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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.