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Finding the Fourth Proportional to 2,266.86, 3,397.89 and 1,290.87

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Solution

The fourth proportional to 2,266.86, 3,397.89 and 1,290.87 is: 1,934.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,266.86 : 3,397.89 = 1,290.87 : x
  2. Step 2: Convert to fraction form
    2,266.86/3,397.89 = 1,290.87/x
  3. Step 3: Cross multiply
    2,266.86x = 3,397.89 × 1,290.87
  4. Step 4: Simplify right side
    2,266.86x = 4,386,234.26
  5. Step 5: Solve for x
    x = 4,386,234.26/2,266.86
  6. Step 6: Final answer
    x = 1,934.94

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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.