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Finding the Fourth Proportional to 559.73, 772.07 and 393.55

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Solution

The fourth proportional to 559.73, 772.07 and 393.55 is: 542.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    559.73 : 772.07 = 393.55 : x
  2. Step 2: Convert to fraction form
    559.73/772.07 = 393.55/x
  3. Step 3: Cross multiply
    559.73x = 772.07 × 393.55
  4. Step 4: Simplify right side
    559.73x = 303,844.25
  5. Step 5: Solve for x
    x = 303,844.25/559.73
  6. Step 6: Final answer
    x = 542.84

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.