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Finding the Fourth Proportional to 2,718.35, 4,077.56 and 770.55

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Solution

The fourth proportional to 2,718.35, 4,077.56 and 770.55 is: 1,155.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,718.35 : 4,077.56 = 770.55 : x
  2. Step 2: Convert to fraction form
    2,718.35/4,077.56 = 770.55/x
  3. Step 3: Cross multiply
    2,718.35x = 4,077.56 × 770.55
  4. Step 4: Simplify right side
    2,718.35x = 3,141,961.93
  5. Step 5: Solve for x
    x = 3,141,961.93/2,718.35
  6. Step 6: Final answer
    x = 1,155.84

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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.