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Finding the Fourth Proportional to 394,172.96, 543,957.84 and 215,324.96

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Solution

The fourth proportional to 394,172.96, 543,957.84 and 215,324.96 is: 297,147.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,172.96 : 543,957.84 = 215,324.96 : x
  2. Step 2: Convert to fraction form
    394,172.96/543,957.84 = 215,324.96/x
  3. Step 3: Cross multiply
    394,172.96x = 543,957.84 × 215,324.96
  4. Step 4: Simplify right side
    394,172.96x = 117,127,700,139.69
  5. Step 5: Solve for x
    x = 117,127,700,139.69/394,172.96
  6. Step 6: Final answer
    x = 297,147.98

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1.5x scale

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.