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Finding the Fourth Proportional to 394,483, 544,386.54 and 215,635

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Solution

The fourth proportional to 394,483, 544,386.54 and 215,635 is: 297,576.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,483 : 544,386.54 = 215,635 : x
  2. Step 2: Convert to fraction form
    394,483/544,386.54 = 215,635/x
  3. Step 3: Cross multiply
    394,483x = 544,386.54 × 215,635
  4. Step 4: Simplify right side
    394,483x = 117,388,791,552.90
  5. Step 5: Solve for x
    x = 117,388,791,552.90/394,483
  6. Step 6: Final answer
    x = 297,576.30

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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.