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Finding the Fourth Proportional to 2,866.96, 3,956.91 and 1,672.12

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Solution

The fourth proportional to 2,866.96, 3,956.91 and 1,672.12 is: 2,307.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,866.96 : 3,956.91 = 1,672.12 : x
  2. Step 2: Convert to fraction form
    2,866.96/3,956.91 = 1,672.12/x
  3. Step 3: Cross multiply
    2,866.96x = 3,956.91 × 1,672.12
  4. Step 4: Simplify right side
    2,866.96x = 6,616,428.35
  5. Step 5: Solve for x
    x = 6,616,428.35/2,866.96
  6. Step 6: Final answer
    x = 2,307.82

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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.