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Finding the Fourth Proportional to 1,586.56, 2,380.23 and 612.73

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Solution

The fourth proportional to 1,586.56, 2,380.23 and 612.73 is: 919.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,586.56 : 2,380.23 = 612.73 : x
  2. Step 2: Convert to fraction form
    1,586.56/2,380.23 = 612.73/x
  3. Step 3: Cross multiply
    1,586.56x = 2,380.23 × 612.73
  4. Step 4: Simplify right side
    1,586.56x = 1,458,438.33
  5. Step 5: Solve for x
    x = 1,458,438.33/1,586.56
  6. Step 6: Final answer
    x = 919.25

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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.