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Finding the Fourth Proportional to 317.44, 437.68 and 206.72

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Solution

The fourth proportional to 317.44, 437.68 and 206.72 is: 285.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    317.44 : 437.68 = 206.72 : x
  2. Step 2: Convert to fraction form
    317.44/437.68 = 206.72/x
  3. Step 3: Cross multiply
    317.44x = 437.68 × 206.72
  4. Step 4: Simplify right side
    317.44x = 90,477.21
  5. Step 5: Solve for x
    x = 90,477.21/317.44
  6. Step 6: Final answer
    x = 285.02

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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.