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Finding the Fourth Proportional to 1,287.27, 1,930.91 and 362.83

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Solution

The fourth proportional to 1,287.27, 1,930.91 and 362.83 is: 544.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,287.27 : 1,930.91 = 362.83 : x
  2. Step 2: Convert to fraction form
    1,287.27/1,930.91 = 362.83/x
  3. Step 3: Cross multiply
    1,287.27x = 1,930.91 × 362.83
  4. Step 4: Simplify right side
    1,287.27x = 700,590.26
  5. Step 5: Solve for x
    x = 700,590.26/1,287.27
  6. Step 6: Final answer
    x = 544.25

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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.