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Finding the Fourth Proportional to 394,470, 544,368.60 and 215,622

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Solution

The fourth proportional to 394,470, 544,368.60 and 215,622 is: 297,558.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,470 : 544,368.60 = 215,622 : x
  2. Step 2: Convert to fraction form
    394,470/544,368.60 = 215,622/x
  3. Step 3: Cross multiply
    394,470x = 544,368.60 × 215,622
  4. Step 4: Simplify right side
    394,470x = 117,377,846,269.20
  5. Step 5: Solve for x
    x = 117,377,846,269.20/394,470
  6. Step 6: Final answer
    x = 297,558.36

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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.