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Finding the Fourth Proportional to 423,487.20, 635,230.80 and 226,879.20

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Solution

The fourth proportional to 423,487.20, 635,230.80 and 226,879.20 is: 340,318.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    423,487.20 : 635,230.80 = 226,879.20 : x
  2. Step 2: Convert to fraction form
    423,487.20/635,230.80 = 226,879.20/x
  3. Step 3: Cross multiply
    423,487.20x = 635,230.80 × 226,879.20
  4. Step 4: Simplify right side
    423,487.20x = 144,120,655,719.36
  5. Step 5: Solve for x
    x = 144,120,655,719.36/423,487.20
  6. Step 6: Final answer
    x = 340,318.80

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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.