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Finding the Fourth Proportional to 316.21, 436.19 and 185.19

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Solution

The fourth proportional to 316.21, 436.19 and 185.19 is: 255.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    316.21 : 436.19 = 185.19 : x
  2. Step 2: Convert to fraction form
    316.21/436.19 = 185.19/x
  3. Step 3: Cross multiply
    316.21x = 436.19 × 185.19
  4. Step 4: Simplify right side
    316.21x = 80,779.48
  5. Step 5: Solve for x
    x = 80,779.48/316.21
  6. Step 6: Final answer
    x = 255.46

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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.