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Finding the Fourth Proportional to 1,178.09, 1,767.22 and 484.75

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Solution

The fourth proportional to 1,178.09, 1,767.22 and 484.75 is: 727.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,178.09 : 1,767.22 = 484.75 : x
  2. Step 2: Convert to fraction form
    1,178.09/1,767.22 = 484.75/x
  3. Step 3: Cross multiply
    1,178.09x = 1,767.22 × 484.75
  4. Step 4: Simplify right side
    1,178.09x = 856,653.44
  5. Step 5: Solve for x
    x = 856,653.44/1,178.09
  6. Step 6: Final answer
    x = 727.15

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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.