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Finding the Fourth Proportional to 494,712.72, 682,703.78 and 279,848.21

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Solution

The fourth proportional to 494,712.72, 682,703.78 and 279,848.21 is: 386,190.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    494,712.72 : 682,703.78 = 279,848.21 : x
  2. Step 2: Convert to fraction form
    494,712.72/682,703.78 = 279,848.21/x
  3. Step 3: Cross multiply
    494,712.72x = 682,703.78 × 279,848.21
  4. Step 4: Simplify right side
    494,712.72x = 191,053,425,980.47
  5. Step 5: Solve for x
    x = 191,053,425,980.47/494,712.72
  6. Step 6: Final answer
    x = 386,190.65

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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.