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Finding the Fourth Proportional to 2,779.57, 4,170.03 and 1,392.49

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Solution

The fourth proportional to 2,779.57, 4,170.03 and 1,392.49 is: 2,089.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,779.57 : 4,170.03 = 1,392.49 : x
  2. Step 2: Convert to fraction form
    2,779.57/4,170.03 = 1,392.49/x
  3. Step 3: Cross multiply
    2,779.57x = 4,170.03 × 1,392.49
  4. Step 4: Simplify right side
    2,779.57x = 5,806,725.07
  5. Step 5: Solve for x
    x = 5,806,725.07/2,779.57
  6. Step 6: Final answer
    x = 2,089.07

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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.