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Finding the Fourth Proportional to 1,586.06, 2,379.99 and 855.62

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Solution

The fourth proportional to 1,586.06, 2,379.99 and 855.62 is: 1,283.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,586.06 : 2,379.99 = 855.62 : x
  2. Step 2: Convert to fraction form
    1,586.06/2,379.99 = 855.62/x
  3. Step 3: Cross multiply
    1,586.06x = 2,379.99 × 855.62
  4. Step 4: Simplify right side
    1,586.06x = 2,036,355.14
  5. Step 5: Solve for x
    x = 2,036,355.14/1,586.06
  6. Step 6: Final answer
    x = 1,283.91

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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.