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Finding the Fourth Proportional to 279,775.87, 386,078.61 and 158,916.79

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Solution

The fourth proportional to 279,775.87, 386,078.61 and 158,916.79 is: 219,298.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,775.87 : 386,078.61 = 158,916.79 : x
  2. Step 2: Convert to fraction form
    279,775.87/386,078.61 = 158,916.79/x
  3. Step 3: Cross multiply
    279,775.87x = 386,078.61 × 158,916.79
  4. Step 4: Simplify right side
    279,775.87x = 61,354,373,388.86
  5. Step 5: Solve for x
    x = 61,354,373,388.86/279,775.87
  6. Step 6: Final answer
    x = 219,298.30

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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.