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Finding the Fourth Proportional to 2,614.55, 3,921.62 and 666.56

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Solution

The fourth proportional to 2,614.55, 3,921.62 and 666.56 is: 999.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,614.55 : 3,921.62 = 666.56 : x
  2. Step 2: Convert to fraction form
    2,614.55/3,921.62 = 666.56/x
  3. Step 3: Cross multiply
    2,614.55x = 3,921.62 × 666.56
  4. Step 4: Simplify right side
    2,614.55x = 2,614,001.50
  5. Step 5: Solve for x
    x = 2,614,001.50/2,614.55
  6. Step 6: Final answer
    x = 999.79

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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.