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Finding the Fourth Proportional to 397,393.50, 548,405.62 and 216,107.40

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Solution

The fourth proportional to 397,393.50, 548,405.62 and 216,107.40 is: 298,229.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    397,393.50 : 548,405.62 = 216,107.40 : x
  2. Step 2: Convert to fraction form
    397,393.50/548,405.62 = 216,107.40/x
  3. Step 3: Cross multiply
    397,393.50x = 548,405.62 × 216,107.40
  4. Step 4: Simplify right side
    397,393.50x = 118,514,512,683.59
  5. Step 5: Solve for x
    x = 118,514,512,683.59/397,393.50
  6. Step 6: Final answer
    x = 298,229.62

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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.