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Finding the Fourth Proportional to 316.86, 437.40 and 223.62

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Solution

The fourth proportional to 316.86, 437.40 and 223.62 is: 308.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    316.86 : 437.40 = 223.62 : x
  2. Step 2: Convert to fraction form
    316.86/437.40 = 223.62/x
  3. Step 3: Cross multiply
    316.86x = 437.40 × 223.62
  4. Step 4: Simplify right side
    316.86x = 97,811.39
  5. Step 5: Solve for x
    x = 97,811.39/316.86
  6. Step 6: Final answer
    x = 308.69

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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.