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Finding the Fourth Proportional to 505.82, 698.01 and 319.25

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Solution

The fourth proportional to 505.82, 698.01 and 319.25 is: 440.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    505.82 : 698.01 = 319.25 : x
  2. Step 2: Convert to fraction form
    505.82/698.01 = 319.25/x
  3. Step 3: Cross multiply
    505.82x = 698.01 × 319.25
  4. Step 4: Simplify right side
    505.82x = 222,839.69
  5. Step 5: Solve for x
    x = 222,839.69/505.82
  6. Step 6: Final answer
    x = 440.55

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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.