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Finding the Fourth Proportional to 397,435.43, 548,455.60 and 216,143.46

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Solution

The fourth proportional to 397,435.43, 548,455.60 and 216,143.46 is: 298,275.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    397,435.43 : 548,455.60 = 216,143.46 : x
  2. Step 2: Convert to fraction form
    397,435.43/548,455.60 = 216,143.46/x
  3. Step 3: Cross multiply
    397,435.43x = 548,455.60 × 216,143.46
  4. Step 4: Simplify right side
    397,435.43x = 118,545,090,500.02
  5. Step 5: Solve for x
    x = 118,545,090,500.02/397,435.43
  6. Step 6: Final answer
    x = 298,275.09

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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.