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Finding the Fourth Proportional to 639,379.32, 959,046.28 and 159,609.84

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Solution

The fourth proportional to 639,379.32, 959,046.28 and 159,609.84 is: 239,409.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,379.32 : 959,046.28 = 159,609.84 : x
  2. Step 2: Convert to fraction form
    639,379.32/959,046.28 = 159,609.84/x
  3. Step 3: Cross multiply
    639,379.32x = 959,046.28 × 159,609.84
  4. Step 4: Simplify right side
    639,379.32x = 153,073,223,303.40
  5. Step 5: Solve for x
    x = 153,073,223,303.40/639,379.32
  6. Step 6: Final answer
    x = 239,409.09

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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.