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Finding the Fourth Proportional to 1,294.64, 1,786.21 and 1,169.90

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Solution

The fourth proportional to 1,294.64, 1,786.21 and 1,169.90 is: 1,614.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,294.64 : 1,786.21 = 1,169.90 : x
  2. Step 2: Convert to fraction form
    1,294.64/1,786.21 = 1,169.90/x
  3. Step 3: Cross multiply
    1,294.64x = 1,786.21 × 1,169.90
  4. Step 4: Simplify right side
    1,294.64x = 2,089,675.22
  5. Step 5: Solve for x
    x = 2,089,675.22/1,294.64
  6. Step 6: Final answer
    x = 1,614.10

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.