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Finding the Fourth Proportional to 308,396.65, 425,704.40 and 276,073.05

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Solution

The fourth proportional to 308,396.65, 425,704.40 and 276,073.05 is: 381,085.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,396.65 : 425,704.40 = 276,073.05 : x
  2. Step 2: Convert to fraction form
    308,396.65/425,704.40 = 276,073.05/x
  3. Step 3: Cross multiply
    308,396.65x = 425,704.40 × 276,073.05
  4. Step 4: Simplify right side
    308,396.65x = 117,525,512,796.60
  5. Step 5: Solve for x
    x = 117,525,512,796.60/308,396.65
  6. Step 6: Final answer
    x = 381,085.57

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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.