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Finding the Fourth Proportional to 352,913.80, 529,370.70 and 212,600.20

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Solution

The fourth proportional to 352,913.80, 529,370.70 and 212,600.20 is: 318,900.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    352,913.80 : 529,370.70 = 212,600.20 : x
  2. Step 2: Convert to fraction form
    352,913.80/529,370.70 = 212,600.20/x
  3. Step 3: Cross multiply
    352,913.80x = 529,370.70 × 212,600.20
  4. Step 4: Simplify right side
    352,913.80x = 112,544,316,694.14
  5. Step 5: Solve for x
    x = 112,544,316,694.14/352,913.80
  6. Step 6: Final answer
    x = 318,900.30

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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.