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Finding the Fourth Proportional to 1,367.69, 2,051.27 and 393.56

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Solution

The fourth proportional to 1,367.69, 2,051.27 and 393.56 is: 590.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,367.69 : 2,051.27 = 393.56 : x
  2. Step 2: Convert to fraction form
    1,367.69/2,051.27 = 393.56/x
  3. Step 3: Cross multiply
    1,367.69x = 2,051.27 × 393.56
  4. Step 4: Simplify right side
    1,367.69x = 807,287.56
  5. Step 5: Solve for x
    x = 807,287.56/1,367.69
  6. Step 6: Final answer
    x = 590.26

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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.