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Finding the Fourth Proportional to 3,813.64, 5,721.17 and 1,347.80

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Solution

The fourth proportional to 3,813.64, 5,721.17 and 1,347.80 is: 2,021.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,813.64 : 5,721.17 = 1,347.80 : x
  2. Step 2: Convert to fraction form
    3,813.64/5,721.17 = 1,347.80/x
  3. Step 3: Cross multiply
    3,813.64x = 5,721.17 × 1,347.80
  4. Step 4: Simplify right side
    3,813.64x = 7,710,957.58
  5. Step 5: Solve for x
    x = 7,710,957.58/3,813.64
  6. Step 6: Final answer
    x = 2,021.94

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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.