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Finding the Fourth Proportional to 3,143.97, 4,715.95 and 835.47

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Solution

The fourth proportional to 3,143.97, 4,715.95 and 835.47 is: 1,253.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,143.97 : 4,715.95 = 835.47 : x
  2. Step 2: Convert to fraction form
    3,143.97/4,715.95 = 835.47/x
  3. Step 3: Cross multiply
    3,143.97x = 4,715.95 × 835.47
  4. Step 4: Simplify right side
    3,143.97x = 3,940,034.75
  5. Step 5: Solve for x
    x = 3,940,034.75/3,143.97
  6. Step 6: Final answer
    x = 1,253.20

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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.