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Finding the Fourth Proportional to 328,431, 492,717.96 and 100,726.74

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Solution

The fourth proportional to 328,431, 492,717.96 and 100,726.74 is: 151,112.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,431 : 492,717.96 = 100,726.74 : x
  2. Step 2: Convert to fraction form
    328,431/492,717.96 = 100,726.74/x
  3. Step 3: Cross multiply
    328,431x = 492,717.96 × 100,726.74
  4. Step 4: Simplify right side
    328,431x = 49,629,873,850.25
  5. Step 5: Solve for x
    x = 49,629,873,850.25/328,431
  6. Step 6: Final answer
    x = 151,112.03

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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.