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Finding the Fourth Proportional to 397,805.10, 548,982.66 and 216,528.72

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Solution

The fourth proportional to 397,805.10, 548,982.66 and 216,528.72 is: 298,815.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    397,805.10 : 548,982.66 = 216,528.72 : x
  2. Step 2: Convert to fraction form
    397,805.10/548,982.66 = 216,528.72/x
  3. Step 3: Cross multiply
    397,805.10x = 548,982.66 × 216,528.72
  4. Step 4: Simplify right side
    397,805.10x = 118,870,512,672.00
  5. Step 5: Solve for x
    x = 118,870,512,672.00/397,805.10
  6. Step 6: Final answer
    x = 298,815.96

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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.