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Finding the Fourth Proportional to 2,119.50, 3,179.76 and 658.56

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Solution

The fourth proportional to 2,119.50, 3,179.76 and 658.56 is: 988.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,119.50 : 3,179.76 = 658.56 : x
  2. Step 2: Convert to fraction form
    2,119.50/3,179.76 = 658.56/x
  3. Step 3: Cross multiply
    2,119.50x = 3,179.76 × 658.56
  4. Step 4: Simplify right side
    2,119.50x = 2,094,062.75
  5. Step 5: Solve for x
    x = 2,094,062.75/2,119.50
  6. Step 6: Final answer
    x = 988.00

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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.