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Finding the Fourth Proportional to 3,071.91, 4,239 and 1,893

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Solution

The fourth proportional to 3,071.91, 4,239 and 1,893 is: 2,612.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,071.91 : 4,239 = 1,893 : x
  2. Step 2: Convert to fraction form
    3,071.91/4,239 = 1,893/x
  3. Step 3: Cross multiply
    3,071.91x = 4,239 × 1,893
  4. Step 4: Simplify right side
    3,071.91x = 8,024,427
  5. Step 5: Solve for x
    x = 8,024,427/3,071.91
  6. Step 6: Final answer
    x = 2,612.19

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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.