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Finding the Fourth Proportional to 2,724.39, 4,085.76 and 776.07

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Solution

The fourth proportional to 2,724.39, 4,085.76 and 776.07 is: 1,163.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,724.39 : 4,085.76 = 776.07 : x
  2. Step 2: Convert to fraction form
    2,724.39/4,085.76 = 776.07/x
  3. Step 3: Cross multiply
    2,724.39x = 4,085.76 × 776.07
  4. Step 4: Simplify right side
    2,724.39x = 3,170,835.76
  5. Step 5: Solve for x
    x = 3,170,835.76/2,724.39
  6. Step 6: Final answer
    x = 1,163.87

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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.