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Finding the Fourth Proportional to 2,486.74, 3,431.48 and 1,367.58

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Solution

The fourth proportional to 2,486.74, 3,431.48 and 1,367.58 is: 1,887.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,486.74 : 3,431.48 = 1,367.58 : x
  2. Step 2: Convert to fraction form
    2,486.74/3,431.48 = 1,367.58/x
  3. Step 3: Cross multiply
    2,486.74x = 3,431.48 × 1,367.58
  4. Step 4: Simplify right side
    2,486.74x = 4,692,823.42
  5. Step 5: Solve for x
    x = 4,692,823.42/2,486.74
  6. Step 6: Final answer
    x = 1,887.14

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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.