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Finding the Fourth Proportional to 2,764.81, 4,147.22 and 817.16

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Solution

The fourth proportional to 2,764.81, 4,147.22 and 817.16 is: 1,225.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,764.81 : 4,147.22 = 817.16 : x
  2. Step 2: Convert to fraction form
    2,764.81/4,147.22 = 817.16/x
  3. Step 3: Cross multiply
    2,764.81x = 4,147.22 × 817.16
  4. Step 4: Simplify right side
    2,764.81x = 3,388,948.58
  5. Step 5: Solve for x
    x = 3,388,948.58/2,764.81
  6. Step 6: Final answer
    x = 1,225.74

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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.