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Finding the Fourth Proportional to 345,939.20, 518,620.80 and 146,412.80

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Solution

The fourth proportional to 345,939.20, 518,620.80 and 146,412.80 is: 219,497.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    345,939.20 : 518,620.80 = 146,412.80 : x
  2. Step 2: Convert to fraction form
    345,939.20/518,620.80 = 146,412.80/x
  3. Step 3: Cross multiply
    345,939.20x = 518,620.80 × 146,412.80
  4. Step 4: Simplify right side
    345,939.20x = 75,932,723,466.24
  5. Step 5: Solve for x
    x = 75,932,723,466.24/345,939.20
  6. Step 6: Final answer
    x = 219,497.31

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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.