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Finding the Fourth Proportional to 352,911.60, 528,589.80 and 212,425.20

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Solution

The fourth proportional to 352,911.60, 528,589.80 and 212,425.20 is: 318,169.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    352,911.60 : 528,589.80 = 212,425.20 : x
  2. Step 2: Convert to fraction form
    352,911.60/528,589.80 = 212,425.20/x
  3. Step 3: Cross multiply
    352,911.60x = 528,589.80 × 212,425.20
  4. Step 4: Simplify right side
    352,911.60x = 112,285,793,982.96
  5. Step 5: Solve for x
    x = 112,285,793,982.96/352,911.60
  6. Step 6: Final answer
    x = 318,169.75

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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.