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Finding the Fourth Proportional to 229.77, 317 and 131.45

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Solution

The fourth proportional to 229.77, 317 and 131.45 is: 181.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    229.77 : 317 = 131.45 : x
  2. Step 2: Convert to fraction form
    229.77/317 = 131.45/x
  3. Step 3: Cross multiply
    229.77x = 317 × 131.45
  4. Step 4: Simplify right side
    229.77x = 41,669.65
  5. Step 5: Solve for x
    x = 41,669.65/229.77
  6. Step 6: Final answer
    x = 181.36

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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.