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Finding the Fourth Proportional to 328,170.38, 492,338.59 and 91,513.08

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Solution

The fourth proportional to 328,170.38, 492,338.59 and 91,513.08 is: 137,292.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,170.38 : 492,338.59 = 91,513.08 : x
  2. Step 2: Convert to fraction form
    328,170.38/492,338.59 = 91,513.08/x
  3. Step 3: Cross multiply
    328,170.38x = 492,338.59 × 91,513.08
  4. Step 4: Simplify right side
    328,170.38x = 45,055,420,544.97
  5. Step 5: Solve for x
    x = 45,055,420,544.97/328,170.38
  6. Step 6: Final answer
    x = 137,292.77

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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.