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Finding the Fourth Proportional to 353,189.20, 529,783.80 and 142,718.80

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Solution

The fourth proportional to 353,189.20, 529,783.80 and 142,718.80 is: 214,078.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    353,189.20 : 529,783.80 = 142,718.80 : x
  2. Step 2: Convert to fraction form
    353,189.20/529,783.80 = 142,718.80/x
  3. Step 3: Cross multiply
    353,189.20x = 529,783.80 × 142,718.80
  4. Step 4: Simplify right side
    353,189.20x = 75,610,108,195.44
  5. Step 5: Solve for x
    x = 75,610,108,195.44/353,189.20
  6. Step 6: Final answer
    x = 214,078.20

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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.