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Finding the Fourth Proportional to 394,731, 544,741.74 and 215,883

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Solution

The fourth proportional to 394,731, 544,741.74 and 215,883 is: 297,925.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,731 : 544,741.74 = 215,883 : x
  2. Step 2: Convert to fraction form
    394,731/544,741.74 = 215,883/x
  3. Step 3: Cross multiply
    394,731x = 544,741.74 × 215,883
  4. Step 4: Simplify right side
    394,731x = 117,600,481,056.42
  5. Step 5: Solve for x
    x = 117,600,481,056.42/394,731
  6. Step 6: Final answer
    x = 297,925.63

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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.