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Finding the Fourth Proportional to 316.48, 436.59 and 223.24

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Solution

The fourth proportional to 316.48, 436.59 and 223.24 is: 307.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    316.48 : 436.59 = 223.24 : x
  2. Step 2: Convert to fraction form
    316.48/436.59 = 223.24/x
  3. Step 3: Cross multiply
    316.48x = 436.59 × 223.24
  4. Step 4: Simplify right side
    316.48x = 97,464.35
  5. Step 5: Solve for x
    x = 97,464.35/316.48
  6. Step 6: Final answer
    x = 307.96

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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.