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Finding the Fourth Proportional to 2,602.86, 3,907.92 and 1,722.78

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Solution

The fourth proportional to 2,602.86, 3,907.92 and 1,722.78 is: 2,586.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,602.86 : 3,907.92 = 1,722.78 : x
  2. Step 2: Convert to fraction form
    2,602.86/3,907.92 = 1,722.78/x
  3. Step 3: Cross multiply
    2,602.86x = 3,907.92 × 1,722.78
  4. Step 4: Simplify right side
    2,602.86x = 6,732,486.42
  5. Step 5: Solve for x
    x = 6,732,486.42/2,602.86
  6. Step 6: Final answer
    x = 2,586.57

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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.