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Finding the Fourth Proportional to 3,757.78, 5,186.12 and 2,164.48

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Solution

The fourth proportional to 3,757.78, 5,186.12 and 2,164.48 is: 2,987.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,757.78 : 5,186.12 = 2,164.48 : x
  2. Step 2: Convert to fraction form
    3,757.78/5,186.12 = 2,164.48/x
  3. Step 3: Cross multiply
    3,757.78x = 5,186.12 × 2,164.48
  4. Step 4: Simplify right side
    3,757.78x = 11,225,253.02
  5. Step 5: Solve for x
    x = 11,225,253.02/3,757.78
  6. Step 6: Final answer
    x = 2,987.20

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1.5x scale

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.