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Finding the Fourth Proportional to 328,085.60, 492,067.65 and 91,379.30

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Solution

The fourth proportional to 328,085.60, 492,067.65 and 91,379.30 is: 137,052.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,085.60 : 492,067.65 = 91,379.30 : x
  2. Step 2: Convert to fraction form
    328,085.60/492,067.65 = 91,379.30/x
  3. Step 3: Cross multiply
    328,085.60x = 492,067.65 × 91,379.30
  4. Step 4: Simplify right side
    328,085.60x = 44,964,797,409.65
  5. Step 5: Solve for x
    x = 44,964,797,409.65/328,085.60
  6. Step 6: Final answer
    x = 137,052.03

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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.