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Finding the Fourth Proportional to 425,760.50, 638,455.31 and 122,087.55

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Solution

The fourth proportional to 425,760.50, 638,455.31 and 122,087.55 is: 183,078.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,760.50 : 638,455.31 = 122,087.55 : x
  2. Step 2: Convert to fraction form
    425,760.50/638,455.31 = 122,087.55/x
  3. Step 3: Cross multiply
    425,760.50x = 638,455.31 × 122,087.55
  4. Step 4: Simplify right side
    425,760.50x = 77,947,447,510.73
  5. Step 5: Solve for x
    x = 77,947,447,510.73/425,760.50
  6. Step 6: Final answer
    x = 183,078.16

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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.