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Finding the Fourth Proportional to 316.89, 437.18 and 185.90

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Solution

The fourth proportional to 316.89, 437.18 and 185.90 is: 256.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    316.89 : 437.18 = 185.90 : x
  2. Step 2: Convert to fraction form
    316.89/437.18 = 185.90/x
  3. Step 3: Cross multiply
    316.89x = 437.18 × 185.90
  4. Step 4: Simplify right side
    316.89x = 81,268.65
  5. Step 5: Solve for x
    x = 81,268.65/316.89
  6. Step 6: Final answer
    x = 256.46

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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.