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Finding the Fourth Proportional to 279,891.30, 386,235.43 and 159,015.81

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Solution

The fourth proportional to 279,891.30, 386,235.43 and 159,015.81 is: 219,433.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,891.30 : 386,235.43 = 159,015.81 : x
  2. Step 2: Convert to fraction form
    279,891.30/386,235.43 = 159,015.81/x
  3. Step 3: Cross multiply
    279,891.30x = 386,235.43 × 159,015.81
  4. Step 4: Simplify right side
    279,891.30x = 61,417,539,752.15
  5. Step 5: Solve for x
    x = 61,417,539,752.15/279,891.30
  6. Step 6: Final answer
    x = 219,433.54

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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.