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Finding the Fourth Proportional to 1,523.81, 2,102.86 and 825.19

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Solution

The fourth proportional to 1,523.81, 2,102.86 and 825.19 is: 1,138.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,523.81 : 2,102.86 = 825.19 : x
  2. Step 2: Convert to fraction form
    1,523.81/2,102.86 = 825.19/x
  3. Step 3: Cross multiply
    1,523.81x = 2,102.86 × 825.19
  4. Step 4: Simplify right side
    1,523.81x = 1,735,248.53
  5. Step 5: Solve for x
    x = 1,735,248.53/1,523.81
  6. Step 6: Final answer
    x = 1,138.76

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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.