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Finding the Fourth Proportional to 1,190.31, 1,785.46 and 324.62

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Solution

The fourth proportional to 1,190.31, 1,785.46 and 324.62 is: 486.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,190.31 : 1,785.46 = 324.62 : x
  2. Step 2: Convert to fraction form
    1,190.31/1,785.46 = 324.62/x
  3. Step 3: Cross multiply
    1,190.31x = 1,785.46 × 324.62
  4. Step 4: Simplify right side
    1,190.31x = 579,596.03
  5. Step 5: Solve for x
    x = 579,596.03/1,190.31
  6. Step 6: Final answer
    x = 486.93

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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.