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Finding the Fourth Proportional to 2,382, 3,573.12 and 843.12

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Solution

The fourth proportional to 2,382, 3,573.12 and 843.12 is: 1,264.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,382 : 3,573.12 = 843.12 : x
  2. Step 2: Convert to fraction form
    2,382/3,573.12 = 843.12/x
  3. Step 3: Cross multiply
    2,382x = 3,573.12 × 843.12
  4. Step 4: Simplify right side
    2,382x = 3,012,568.93
  5. Step 5: Solve for x
    x = 3,012,568.93/2,382
  6. Step 6: Final answer
    x = 1,264.72

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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.