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Finding the Fourth Proportional to 230.86, 317.78 and 208.99

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Solution

The fourth proportional to 230.86, 317.78 and 208.99 is: 287.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    230.86 : 317.78 = 208.99 : x
  2. Step 2: Convert to fraction form
    230.86/317.78 = 208.99/x
  3. Step 3: Cross multiply
    230.86x = 317.78 × 208.99
  4. Step 4: Simplify right side
    230.86x = 66,411.80
  5. Step 5: Solve for x
    x = 66,411.80/230.86
  6. Step 6: Final answer
    x = 287.67

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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.