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Finding the Fourth Proportional to 2,139.76, 3,209.90 and 600.76

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Solution

The fourth proportional to 2,139.76, 3,209.90 and 600.76 is: 901.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,139.76 : 3,209.90 = 600.76 : x
  2. Step 2: Convert to fraction form
    2,139.76/3,209.90 = 600.76/x
  3. Step 3: Cross multiply
    2,139.76x = 3,209.90 × 600.76
  4. Step 4: Simplify right side
    2,139.76x = 1,928,379.52
  5. Step 5: Solve for x
    x = 1,928,379.52/2,139.76
  6. Step 6: Final answer
    x = 901.21

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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.