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Finding the Fourth Proportional to 536.31, 804.89 and 211.90

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Solution

The fourth proportional to 536.31, 804.89 and 211.90 is: 318.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    536.31 : 804.89 = 211.90 : x
  2. Step 2: Convert to fraction form
    536.31/804.89 = 211.90/x
  3. Step 3: Cross multiply
    536.31x = 804.89 × 211.90
  4. Step 4: Simplify right side
    536.31x = 170,555.13
  5. Step 5: Solve for x
    x = 170,555.13/536.31
  6. Step 6: Final answer
    x = 318.02

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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.