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Finding the Fourth Proportional to 2,666.72, 3,994.31 and 2,045.86

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Solution

The fourth proportional to 2,666.72, 3,994.31 and 2,045.86 is: 3,064.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,666.72 : 3,994.31 = 2,045.86 : x
  2. Step 2: Convert to fraction form
    2,666.72/3,994.31 = 2,045.86/x
  3. Step 3: Cross multiply
    2,666.72x = 3,994.31 × 2,045.86
  4. Step 4: Simplify right side
    2,666.72x = 8,171,794.19
  5. Step 5: Solve for x
    x = 8,171,794.19/2,666.72
  6. Step 6: Final answer
    x = 3,064.36

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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.