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Finding the Fourth Proportional to 1,447.93, 2,166.51 and 863.26

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Solution

The fourth proportional to 1,447.93, 2,166.51 and 863.26 is: 1,291.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,447.93 : 2,166.51 = 863.26 : x
  2. Step 2: Convert to fraction form
    1,447.93/2,166.51 = 863.26/x
  3. Step 3: Cross multiply
    1,447.93x = 2,166.51 × 863.26
  4. Step 4: Simplify right side
    1,447.93x = 1,870,259.24
  5. Step 5: Solve for x
    x = 1,870,259.24/1,447.93
  6. Step 6: Final answer
    x = 1,291.67

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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.