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Finding the Fourth Proportional to 431,940.71, 648,107.99 and 221,726.39

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Solution

The fourth proportional to 431,940.71, 648,107.99 and 221,726.39 is: 332,690.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,940.71 : 648,107.99 = 221,726.39 : x
  2. Step 2: Convert to fraction form
    431,940.71/648,107.99 = 221,726.39/x
  3. Step 3: Cross multiply
    431,940.71x = 648,107.99 × 221,726.39
  4. Step 4: Simplify right side
    431,940.71x = 143,702,643,844.22
  5. Step 5: Solve for x
    x = 143,702,643,844.22/431,940.71
  6. Step 6: Final answer
    x = 332,690.67

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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.