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Finding the Fourth Proportional to 316.50, 436.77 and 185.61

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Solution

The fourth proportional to 316.50, 436.77 and 185.61 is: 256.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    316.50 : 436.77 = 185.61 : x
  2. Step 2: Convert to fraction form
    316.50/436.77 = 185.61/x
  3. Step 3: Cross multiply
    316.50x = 436.77 × 185.61
  4. Step 4: Simplify right side
    316.50x = 81,068.88
  5. Step 5: Solve for x
    x = 81,068.88/316.50
  6. Step 6: Final answer
    x = 256.14

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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.