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Finding the Fourth Proportional to 2,419.74, 3,339 and 1,371.78

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Solution

The fourth proportional to 2,419.74, 3,339 and 1,371.78 is: 1,892.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,419.74 : 3,339 = 1,371.78 : x
  2. Step 2: Convert to fraction form
    2,419.74/3,339 = 1,371.78/x
  3. Step 3: Cross multiply
    2,419.74x = 3,339 × 1,371.78
  4. Step 4: Simplify right side
    2,419.74x = 4,580,373.42
  5. Step 5: Solve for x
    x = 4,580,373.42/2,419.74
  6. Step 6: Final answer
    x = 1,892.92

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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.