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Finding the Fourth Proportional to 317.98, 438.96 and 186.94

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Solution

The fourth proportional to 317.98, 438.96 and 186.94 is: 258.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    317.98 : 438.96 = 186.94 : x
  2. Step 2: Convert to fraction form
    317.98/438.96 = 186.94/x
  3. Step 3: Cross multiply
    317.98x = 438.96 × 186.94
  4. Step 4: Simplify right side
    317.98x = 82,059.18
  5. Step 5: Solve for x
    x = 82,059.18/317.98
  6. Step 6: Final answer
    x = 258.06

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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.