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Finding the Fourth Proportional to 3,729, 5,144.76 and 2,156.52

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Solution

The fourth proportional to 3,729, 5,144.76 and 2,156.52 is: 2,975.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,729 : 5,144.76 = 2,156.52 : x
  2. Step 2: Convert to fraction form
    3,729/5,144.76 = 2,156.52/x
  3. Step 3: Cross multiply
    3,729x = 5,144.76 × 2,156.52
  4. Step 4: Simplify right side
    3,729x = 11,094,777.84
  5. Step 5: Solve for x
    x = 11,094,777.84/3,729
  6. Step 6: Final answer
    x = 2,975.27

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.