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Finding the Fourth Proportional to 575.81, 794.21 and 398.82

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Solution

The fourth proportional to 575.81, 794.21 and 398.82 is: 550.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    575.81 : 794.21 = 398.82 : x
  2. Step 2: Convert to fraction form
    575.81/794.21 = 398.82/x
  3. Step 3: Cross multiply
    575.81x = 794.21 × 398.82
  4. Step 4: Simplify right side
    575.81x = 316,744.84
  5. Step 5: Solve for x
    x = 316,744.84/575.81
  6. Step 6: Final answer
    x = 550.09

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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.