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Finding the Fourth Proportional to 3,630.79, 5,011.19 and 2,139.99

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Solution

The fourth proportional to 3,630.79, 5,011.19 and 2,139.99 is: 2,953.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,630.79 : 5,011.19 = 2,139.99 : x
  2. Step 2: Convert to fraction form
    3,630.79/5,011.19 = 2,139.99/x
  3. Step 3: Cross multiply
    3,630.79x = 5,011.19 × 2,139.99
  4. Step 4: Simplify right side
    3,630.79x = 10,723,896.49
  5. Step 5: Solve for x
    x = 10,723,896.49/3,630.79
  6. Step 6: Final answer
    x = 2,953.60

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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.