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Finding the Fourth Proportional to 1,171.20, 1,758.18 and 623.64

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Solution

The fourth proportional to 1,171.20, 1,758.18 and 623.64 is: 936.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,171.20 : 1,758.18 = 623.64 : x
  2. Step 2: Convert to fraction form
    1,171.20/1,758.18 = 623.64/x
  3. Step 3: Cross multiply
    1,171.20x = 1,758.18 × 623.64
  4. Step 4: Simplify right side
    1,171.20x = 1,096,471.38
  5. Step 5: Solve for x
    x = 1,096,471.38/1,171.20
  6. Step 6: Final answer
    x = 936.19

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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.