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Finding the Fourth Proportional to 1,367.64, 2,051.81 and 393.75

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Solution

The fourth proportional to 1,367.64, 2,051.81 and 393.75 is: 590.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,367.64 : 2,051.81 = 393.75 : x
  2. Step 2: Convert to fraction form
    1,367.64/2,051.81 = 393.75/x
  3. Step 3: Cross multiply
    1,367.64x = 2,051.81 × 393.75
  4. Step 4: Simplify right side
    1,367.64x = 807,901.17
  5. Step 5: Solve for x
    x = 807,901.17/1,367.64
  6. Step 6: Final answer
    x = 590.73

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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.