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Finding the Fourth Proportional to 394,758.48, 544,422.42 and 279,809.76

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Solution

The fourth proportional to 394,758.48, 544,422.42 and 279,809.76 is: 385,893.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,758.48 : 544,422.42 = 279,809.76 : x
  2. Step 2: Convert to fraction form
    394,758.48/544,422.42 = 279,809.76/x
  3. Step 3: Cross multiply
    394,758.48x = 544,422.42 × 279,809.76
  4. Step 4: Simplify right side
    394,758.48x = 152,334,706,678.82
  5. Step 5: Solve for x
    x = 152,334,706,678.82/394,758.48
  6. Step 6: Final answer
    x = 385,893.44

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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.