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Finding the Fourth Proportional to 3,143.80, 4,702.72 and 2,858.68

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Solution

The fourth proportional to 3,143.80, 4,702.72 and 2,858.68 is: 4,276.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,143.80 : 4,702.72 = 2,858.68 : x
  2. Step 2: Convert to fraction form
    3,143.80/4,702.72 = 2,858.68/x
  3. Step 3: Cross multiply
    3,143.80x = 4,702.72 × 2,858.68
  4. Step 4: Simplify right side
    3,143.80x = 13,443,571.61
  5. Step 5: Solve for x
    x = 13,443,571.61/3,143.80
  6. Step 6: Final answer
    x = 4,276.22

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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.