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Finding the Fourth Proportional to 328,195.74, 492,376.68 and 91,538.43

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Solution

The fourth proportional to 328,195.74, 492,376.68 and 91,538.43 is: 137,330.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,195.74 : 492,376.68 = 91,538.43 : x
  2. Step 2: Convert to fraction form
    328,195.74/492,376.68 = 91,538.43/x
  3. Step 3: Cross multiply
    328,195.74x = 492,376.68 × 91,538.43
  4. Step 4: Simplify right side
    328,195.74x = 45,071,388,255.81
  5. Step 5: Solve for x
    x = 45,071,388,255.81/328,195.74
  6. Step 6: Final answer
    x = 137,330.81

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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.