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Finding the Fourth Proportional to 279,775.38, 386,077.92 and 158,916.28

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Solution

The fourth proportional to 279,775.38, 386,077.92 and 158,916.28 is: 219,297.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,775.38 : 386,077.92 = 158,916.28 : x
  2. Step 2: Convert to fraction form
    279,775.38/386,077.92 = 158,916.28/x
  3. Step 3: Cross multiply
    279,775.38x = 386,077.92 × 158,916.28
  4. Step 4: Simplify right side
    279,775.38x = 61,354,066,836.54
  5. Step 5: Solve for x
    x = 61,354,066,836.54/279,775.38
  6. Step 6: Final answer
    x = 219,297.59

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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.