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Finding the Fourth Proportional to 2,998.79, 4,138.29 and 1,672.52

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Solution

The fourth proportional to 2,998.79, 4,138.29 and 1,672.52 is: 2,308.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,998.79 : 4,138.29 = 1,672.52 : x
  2. Step 2: Convert to fraction form
    2,998.79/4,138.29 = 1,672.52/x
  3. Step 3: Cross multiply
    2,998.79x = 4,138.29 × 1,672.52
  4. Step 4: Simplify right side
    2,998.79x = 6,921,352.10
  5. Step 5: Solve for x
    x = 6,921,352.10/2,998.79
  6. Step 6: Final answer
    x = 2,308.05

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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.