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Finding the Fourth Proportional to 328,469.40, 492,704.10 and 91,811.70

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Solution

The fourth proportional to 328,469.40, 492,704.10 and 91,811.70 is: 137,717.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,469.40 : 492,704.10 = 91,811.70 : x
  2. Step 2: Convert to fraction form
    328,469.40/492,704.10 = 91,811.70/x
  3. Step 3: Cross multiply
    328,469.40x = 492,704.10 × 91,811.70
  4. Step 4: Simplify right side
    328,469.40x = 45,236,001,017.97
  5. Step 5: Solve for x
    x = 45,236,001,017.97/328,469.40
  6. Step 6: Final answer
    x = 137,717.55

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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.