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Finding the Fourth Proportional to 279,809.58, 386,027.61 and 172,192.78

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Solution

The fourth proportional to 279,809.58, 386,027.61 and 172,192.78 is: 237,558.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,809.58 : 386,027.61 = 172,192.78 : x
  2. Step 2: Convert to fraction form
    279,809.58/386,027.61 = 172,192.78/x
  3. Step 3: Cross multiply
    279,809.58x = 386,027.61 × 172,192.78
  4. Step 4: Simplify right side
    279,809.58x = 66,471,167,159.47
  5. Step 5: Solve for x
    x = 66,471,167,159.47/279,809.58
  6. Step 6: Final answer
    x = 237,558.58

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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.