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Finding the Fourth Proportional to 286,906, 395,930.28 and 167,674

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Solution

The fourth proportional to 286,906, 395,930.28 and 167,674 is: 231,390.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    286,906 : 395,930.28 = 167,674 : x
  2. Step 2: Convert to fraction form
    286,906/395,930.28 = 167,674/x
  3. Step 3: Cross multiply
    286,906x = 395,930.28 × 167,674
  4. Step 4: Simplify right side
    286,906x = 66,387,213,768.72
  5. Step 5: Solve for x
    x = 66,387,213,768.72/286,906
  6. Step 6: Final answer
    x = 231,390.12

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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.