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Finding the Fourth Proportional to 394,663.84, 544,625.04 and 215,812

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Solution

The fourth proportional to 394,663.84, 544,625.04 and 215,812 is: 297,814.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,663.84 : 544,625.04 = 215,812 : x
  2. Step 2: Convert to fraction form
    394,663.84/544,625.04 = 215,812/x
  3. Step 3: Cross multiply
    394,663.84x = 544,625.04 × 215,812
  4. Step 4: Simplify right side
    394,663.84x = 117,536,619,132.48
  5. Step 5: Solve for x
    x = 117,536,619,132.48/394,663.84
  6. Step 6: Final answer
    x = 297,814.51

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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.