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Finding the Fourth Proportional to 328,188.39, 492,365.66 and 91,531.07

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Solution

The fourth proportional to 328,188.39, 492,365.66 and 91,531.07 is: 137,319.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,188.39 : 492,365.66 = 91,531.07 : x
  2. Step 2: Convert to fraction form
    328,188.39/492,365.66 = 91,531.07/x
  3. Step 3: Cross multiply
    328,188.39x = 492,365.66 × 91,531.07
  4. Step 4: Simplify right side
    328,188.39x = 45,066,757,150.80
  5. Step 5: Solve for x
    x = 45,066,757,150.80/328,188.39
  6. Step 6: Final answer
    x = 137,319.78

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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.