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Finding the Fourth Proportional to 536.87, 805.67 and 212.31

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Solution

The fourth proportional to 536.87, 805.67 and 212.31 is: 318.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    536.87 : 805.67 = 212.31 : x
  2. Step 2: Convert to fraction form
    536.87/805.67 = 212.31/x
  3. Step 3: Cross multiply
    536.87x = 805.67 × 212.31
  4. Step 4: Simplify right side
    536.87x = 171,050.74
  5. Step 5: Solve for x
    x = 171,050.74/536.87
  6. Step 6: Final answer
    x = 318.61

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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.