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Finding the Fourth Proportional to 328,622.43, 492,914.21 and 91,959.87

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Solution

The fourth proportional to 328,622.43, 492,914.21 and 91,959.87 is: 137,934.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,622.43 : 492,914.21 = 91,959.87 : x
  2. Step 2: Convert to fraction form
    328,622.43/492,914.21 = 91,959.87/x
  3. Step 3: Cross multiply
    328,622.43x = 492,914.21 × 91,959.87
  4. Step 4: Simplify right side
    328,622.43x = 45,328,326,212.95
  5. Step 5: Solve for x
    x = 45,328,326,212.95/328,622.43
  6. Step 6: Final answer
    x = 137,934.37

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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.