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Finding the Fourth Proportional to 1,179.27, 1,768.30 and 485.81

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Solution

The fourth proportional to 1,179.27, 1,768.30 and 485.81 is: 728.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,179.27 : 1,768.30 = 485.81 : x
  2. Step 2: Convert to fraction form
    1,179.27/1,768.30 = 485.81/x
  3. Step 3: Cross multiply
    1,179.27x = 1,768.30 × 485.81
  4. Step 4: Simplify right side
    1,179.27x = 859,052.19
  5. Step 5: Solve for x
    x = 859,052.19/1,179.27
  6. Step 6: Final answer
    x = 728.46

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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.