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Finding the Fourth Proportional to 3,889.86, 5,832.51 and 2,658.76

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Solution

The fourth proportional to 3,889.86, 5,832.51 and 2,658.76 is: 3,986.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,889.86 : 5,832.51 = 2,658.76 : x
  2. Step 2: Convert to fraction form
    3,889.86/5,832.51 = 2,658.76/x
  3. Step 3: Cross multiply
    3,889.86x = 5,832.51 × 2,658.76
  4. Step 4: Simplify right side
    3,889.86x = 15,507,219.74
  5. Step 5: Solve for x
    x = 15,507,219.74/3,889.86
  6. Step 6: Final answer
    x = 3,986.58

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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.