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Finding the Fourth Proportional to 279,876.81, 386,230.11 and 159,018.26

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Solution

The fourth proportional to 279,876.81, 386,230.11 and 159,018.26 is: 219,445.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,876.81 : 386,230.11 = 159,018.26 : x
  2. Step 2: Convert to fraction form
    279,876.81/386,230.11 = 159,018.26/x
  3. Step 3: Cross multiply
    279,876.81x = 386,230.11 × 159,018.26
  4. Step 4: Simplify right side
    279,876.81x = 61,417,640,051.81
  5. Step 5: Solve for x
    x = 61,417,640,051.81/279,876.81
  6. Step 6: Final answer
    x = 219,445.26

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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.