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Finding the Fourth Proportional to 1,842.60, 2,764.32 and 747.72

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Solution

The fourth proportional to 1,842.60, 2,764.32 and 747.72 is: 1,121.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,842.60 : 2,764.32 = 747.72 : x
  2. Step 2: Convert to fraction form
    1,842.60/2,764.32 = 747.72/x
  3. Step 3: Cross multiply
    1,842.60x = 2,764.32 × 747.72
  4. Step 4: Simplify right side
    1,842.60x = 2,066,937.35
  5. Step 5: Solve for x
    x = 2,066,937.35/1,842.60
  6. Step 6: Final answer
    x = 1,121.75

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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.