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Finding the Fourth Proportional to 536.31, 804.63 and 389.79

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Solution

The fourth proportional to 536.31, 804.63 and 389.79 is: 584.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    536.31 : 804.63 = 389.79 : x
  2. Step 2: Convert to fraction form
    536.31/804.63 = 389.79/x
  3. Step 3: Cross multiply
    536.31x = 804.63 × 389.79
  4. Step 4: Simplify right side
    536.31x = 313,635.93
  5. Step 5: Solve for x
    x = 313,635.93/536.31
  6. Step 6: Final answer
    x = 584.80

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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.