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Finding the Fourth Proportional to 2,121.75, 3,182.81 and 582.75

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Solution

The fourth proportional to 2,121.75, 3,182.81 and 582.75 is: 874.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,121.75 : 3,182.81 = 582.75 : x
  2. Step 2: Convert to fraction form
    2,121.75/3,182.81 = 582.75/x
  3. Step 3: Cross multiply
    2,121.75x = 3,182.81 × 582.75
  4. Step 4: Simplify right side
    2,121.75x = 1,854,779.61
  5. Step 5: Solve for x
    x = 1,854,779.61/2,121.75
  6. Step 6: Final answer
    x = 874.17

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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.