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Finding the Fourth Proportional to 2,712.37, 4,068.72 and 764.74

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Solution

The fourth proportional to 2,712.37, 4,068.72 and 764.74 is: 1,147.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,712.37 : 4,068.72 = 764.74 : x
  2. Step 2: Convert to fraction form
    2,712.37/4,068.72 = 764.74/x
  3. Step 3: Cross multiply
    2,712.37x = 4,068.72 × 764.74
  4. Step 4: Simplify right side
    2,712.37x = 3,111,512.93
  5. Step 5: Solve for x
    x = 3,111,512.93/2,712.37
  6. Step 6: Final answer
    x = 1,147.16

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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.