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Finding the Fourth Proportional to 317.27, 437.90 and 212.55

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Solution

The fourth proportional to 317.27, 437.90 and 212.55 is: 293.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    317.27 : 437.90 = 212.55 : x
  2. Step 2: Convert to fraction form
    317.27/437.90 = 212.55/x
  3. Step 3: Cross multiply
    317.27x = 437.90 × 212.55
  4. Step 4: Simplify right side
    317.27x = 93,074.58
  5. Step 5: Solve for x
    x = 93,074.58/317.27
  6. Step 6: Final answer
    x = 293.37

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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.