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Finding the Fourth Proportional to 1,419.92, 2,117.14 and 1,394

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Solution

The fourth proportional to 1,419.92, 2,117.14 and 1,394 is: 2,078.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,419.92 : 2,117.14 = 1,394 : x
  2. Step 2: Convert to fraction form
    1,419.92/2,117.14 = 1,394/x
  3. Step 3: Cross multiply
    1,419.92x = 2,117.14 × 1,394
  4. Step 4: Simplify right side
    1,419.92x = 2,951,293.16
  5. Step 5: Solve for x
    x = 2,951,293.16/1,419.92
  6. Step 6: Final answer
    x = 2,078.49

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.