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Finding the Fourth Proportional to 352,604.40, 528,906.60 and 212,636.40

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Solution

The fourth proportional to 352,604.40, 528,906.60 and 212,636.40 is: 318,954.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    352,604.40 : 528,906.60 = 212,636.40 : x
  2. Step 2: Convert to fraction form
    352,604.40/528,906.60 = 212,636.40/x
  3. Step 3: Cross multiply
    352,604.40x = 528,906.60 × 212,636.40
  4. Step 4: Simplify right side
    352,604.40x = 112,464,795,360.24
  5. Step 5: Solve for x
    x = 112,464,795,360.24/352,604.40
  6. Step 6: Final answer
    x = 318,954.60

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.