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Finding the Fourth Proportional to 1,845.21, 2,768.18 and 690.96

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Solution

The fourth proportional to 1,845.21, 2,768.18 and 690.96 is: 1,036.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,845.21 : 2,768.18 = 690.96 : x
  2. Step 2: Convert to fraction form
    1,845.21/2,768.18 = 690.96/x
  3. Step 3: Cross multiply
    1,845.21x = 2,768.18 × 690.96
  4. Step 4: Simplify right side
    1,845.21x = 1,912,698.20
  5. Step 5: Solve for x
    x = 1,912,698.20/1,845.21
  6. Step 6: Final answer
    x = 1,036.57

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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.