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Finding the Fourth Proportional to 1,367.08, 2,047.65 and 847.21

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Solution

The fourth proportional to 1,367.08, 2,047.65 and 847.21 is: 1,268.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,367.08 : 2,047.65 = 847.21 : x
  2. Step 2: Convert to fraction form
    1,367.08/2,047.65 = 847.21/x
  3. Step 3: Cross multiply
    1,367.08x = 2,047.65 × 847.21
  4. Step 4: Simplify right side
    1,367.08x = 1,734,785.10
  5. Step 5: Solve for x
    x = 1,734,785.10/1,367.08
  6. Step 6: Final answer
    x = 1,268.97

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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.