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Finding the Fourth Proportional to 423,939.80, 635,229.30 and 223,999.40

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Solution

The fourth proportional to 423,939.80, 635,229.30 and 223,999.40 is: 335,639.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    423,939.80 : 635,229.30 = 223,999.40 : x
  2. Step 2: Convert to fraction form
    423,939.80/635,229.30 = 223,999.40/x
  3. Step 3: Cross multiply
    423,939.80x = 635,229.30 × 223,999.40
  4. Step 4: Simplify right side
    423,939.80x = 142,290,982,062.42
  5. Step 5: Solve for x
    x = 142,290,982,062.42/423,939.80
  6. Step 6: Final answer
    x = 335,639.59

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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.