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Finding the Fourth Proportional to 3,081.16, 4,621.74 and 772.66

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Solution

The fourth proportional to 3,081.16, 4,621.74 and 772.66 is: 1,158.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,081.16 : 4,621.74 = 772.66 : x
  2. Step 2: Convert to fraction form
    3,081.16/4,621.74 = 772.66/x
  3. Step 3: Cross multiply
    3,081.16x = 4,621.74 × 772.66
  4. Step 4: Simplify right side
    3,081.16x = 3,571,033.63
  5. Step 5: Solve for x
    x = 3,571,033.63/3,081.16
  6. Step 6: Final answer
    x = 1,158.99

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Similar ratio
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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.