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Finding the Fourth Proportional to 1,367.55, 2,051.42 and 393.66

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Solution

The fourth proportional to 1,367.55, 2,051.42 and 393.66 is: 590.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,367.55 : 2,051.42 = 393.66 : x
  2. Step 2: Convert to fraction form
    1,367.55/2,051.42 = 393.66/x
  3. Step 3: Cross multiply
    1,367.55x = 2,051.42 × 393.66
  4. Step 4: Simplify right side
    1,367.55x = 807,562.00
  5. Step 5: Solve for x
    x = 807,562.00/1,367.55
  6. Step 6: Final answer
    x = 590.52

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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.