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Finding the Fourth Proportional to 2,717.91, 4,076.87 and 770.09

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Solution

The fourth proportional to 2,717.91, 4,076.87 and 770.09 is: 1,155.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,717.91 : 4,076.87 = 770.09 : x
  2. Step 2: Convert to fraction form
    2,717.91/4,076.87 = 770.09/x
  3. Step 3: Cross multiply
    2,717.91x = 4,076.87 × 770.09
  4. Step 4: Simplify right side
    2,717.91x = 3,139,532.58
  5. Step 5: Solve for x
    x = 3,139,532.58/2,717.91
  6. Step 6: Final answer
    x = 1,155.13

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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.