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Finding the Fourth Proportional to 397,366.56, 548,362.80 and 216,078.60

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Solution

The fourth proportional to 397,366.56, 548,362.80 and 216,078.60 is: 298,186.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    397,366.56 : 548,362.80 = 216,078.60 : x
  2. Step 2: Convert to fraction form
    397,366.56/548,362.80 = 216,078.60/x
  3. Step 3: Cross multiply
    397,366.56x = 548,362.80 × 216,078.60
  4. Step 4: Simplify right side
    397,366.56x = 118,489,466,116.08
  5. Step 5: Solve for x
    x = 118,489,466,116.08/397,366.56
  6. Step 6: Final answer
    x = 298,186.81

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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.