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Finding the Fourth Proportional to 1,523.85, 2,102.88 and 860.73

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Solution

The fourth proportional to 1,523.85, 2,102.88 and 860.73 is: 1,187.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,523.85 : 2,102.88 = 860.73 : x
  2. Step 2: Convert to fraction form
    1,523.85/2,102.88 = 860.73/x
  3. Step 3: Cross multiply
    1,523.85x = 2,102.88 × 860.73
  4. Step 4: Simplify right side
    1,523.85x = 1,810,015.13
  5. Step 5: Solve for x
    x = 1,810,015.13/1,523.85
  6. Step 6: Final answer
    x = 1,187.79

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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.