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Finding the Fourth Proportional to 2,497.86, 3,447 and 1,378.77

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Solution

The fourth proportional to 2,497.86, 3,447 and 1,378.77 is: 1,902.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,497.86 : 3,447 = 1,378.77 : x
  2. Step 2: Convert to fraction form
    2,497.86/3,447 = 1,378.77/x
  3. Step 3: Cross multiply
    2,497.86x = 3,447 × 1,378.77
  4. Step 4: Simplify right side
    2,497.86x = 4,752,620.19
  5. Step 5: Solve for x
    x = 4,752,620.19/2,497.86
  6. Step 6: Final answer
    x = 1,902.68

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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.