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Finding the Fourth Proportional to 316.87, 436.51 and 223.42

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Solution

The fourth proportional to 316.87, 436.51 and 223.42 is: 307.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    316.87 : 436.51 = 223.42 : x
  2. Step 2: Convert to fraction form
    316.87/436.51 = 223.42/x
  3. Step 3: Cross multiply
    316.87x = 436.51 × 223.42
  4. Step 4: Simplify right side
    316.87x = 97,525.06
  5. Step 5: Solve for x
    x = 97,525.06/316.87
  6. Step 6: Final answer
    x = 307.78

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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.