Home / 1,189.48-1,784.19-323.80

Finding the Fourth Proportional to 1,189.48, 1,784.19 and 323.80

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Solution

The fourth proportional to 1,189.48, 1,784.19 and 323.80 is: 485.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,189.48 : 1,784.19 = 323.80 : x
  2. Step 2: Convert to fraction form
    1,189.48/1,784.19 = 323.80/x
  3. Step 3: Cross multiply
    1,189.48x = 1,784.19 × 323.80
  4. Step 4: Simplify right side
    1,189.48x = 577,720.72
  5. Step 5: Solve for x
    x = 577,720.72/1,189.48
  6. Step 6: Final answer
    x = 485.69

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Double scale
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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.