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Finding the Fourth Proportional to 1,904.27, 2,856.64 and 671.43

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Solution

The fourth proportional to 1,904.27, 2,856.64 and 671.43 is: 1,007.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,904.27 : 2,856.64 = 671.43 : x
  2. Step 2: Convert to fraction form
    1,904.27/2,856.64 = 671.43/x
  3. Step 3: Cross multiply
    1,904.27x = 2,856.64 × 671.43
  4. Step 4: Simplify right side
    1,904.27x = 1,918,016.15
  5. Step 5: Solve for x
    x = 1,918,016.15/1,904.27
  6. Step 6: Final answer
    x = 1,007.22

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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.