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Finding the Fourth Proportional to 423,864.40, 635,796.90 and 108,321.64

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Solution

The fourth proportional to 423,864.40, 635,796.90 and 108,321.64 is: 162,482.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    423,864.40 : 635,796.90 = 108,321.64 : x
  2. Step 2: Convert to fraction form
    423,864.40/635,796.90 = 108,321.64/x
  3. Step 3: Cross multiply
    423,864.40x = 635,796.90 × 108,321.64
  4. Step 4: Simplify right side
    423,864.40x = 68,870,562,914.92
  5. Step 5: Solve for x
    x = 68,870,562,914.92/423,864.40
  6. Step 6: Final answer
    x = 162,482.54

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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.