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Finding the Fourth Proportional to 2,621.83, 3,932.74 and 772.97

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Solution

The fourth proportional to 2,621.83, 3,932.74 and 772.97 is: 1,159.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,621.83 : 3,932.74 = 772.97 : x
  2. Step 2: Convert to fraction form
    2,621.83/3,932.74 = 772.97/x
  3. Step 3: Cross multiply
    2,621.83x = 3,932.74 × 772.97
  4. Step 4: Simplify right side
    2,621.83x = 3,039,871.34
  5. Step 5: Solve for x
    x = 3,039,871.34/2,621.83
  6. Step 6: Final answer
    x = 1,159.45

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Similar ratio
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1.5x scale

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.