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Finding the Fourth Proportional to 307,759.70, 424,709.53 and 171,791.21

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Solution

The fourth proportional to 307,759.70, 424,709.53 and 171,791.21 is: 237,072.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    307,759.70 : 424,709.53 = 171,791.21 : x
  2. Step 2: Convert to fraction form
    307,759.70/424,709.53 = 171,791.21/x
  3. Step 3: Cross multiply
    307,759.70x = 424,709.53 × 171,791.21
  4. Step 4: Simplify right side
    307,759.70x = 72,961,364,689.53
  5. Step 5: Solve for x
    x = 72,961,364,689.53/307,759.70
  6. Step 6: Final answer
    x = 237,072.51

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.