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Finding the Fourth Proportional to 352,940.40, 529,514.48 and 128,297.30

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Solution

The fourth proportional to 352,940.40, 529,514.48 and 128,297.30 is: 192,483.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    352,940.40 : 529,514.48 = 128,297.30 : x
  2. Step 2: Convert to fraction form
    352,940.40/529,514.48 = 128,297.30/x
  3. Step 3: Cross multiply
    352,940.40x = 529,514.48 × 128,297.30
  4. Step 4: Simplify right side
    352,940.40x = 67,935,278,094.90
  5. Step 5: Solve for x
    x = 67,935,278,094.90/352,940.40
  6. Step 6: Final answer
    x = 192,483.71

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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.