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Finding the Fourth Proportional to 535.90, 804.12 and 211.36

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Solution

The fourth proportional to 535.90, 804.12 and 211.36 is: 317.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    535.90 : 804.12 = 211.36 : x
  2. Step 2: Convert to fraction form
    535.90/804.12 = 211.36/x
  3. Step 3: Cross multiply
    535.90x = 804.12 × 211.36
  4. Step 4: Simplify right side
    535.90x = 169,958.80
  5. Step 5: Solve for x
    x = 169,958.80/535.90
  6. Step 6: Final answer
    x = 317.15

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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.