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Finding the Fourth Proportional to 425,364.87, 638,141.91 and 185,517.55

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Solution

The fourth proportional to 425,364.87, 638,141.91 and 185,517.55 is: 278,317.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,364.87 : 638,141.91 = 185,517.55 : x
  2. Step 2: Convert to fraction form
    425,364.87/638,141.91 = 185,517.55/x
  3. Step 3: Cross multiply
    425,364.87x = 638,141.91 × 185,517.55
  4. Step 4: Simplify right side
    425,364.87x = 118,386,522,767.93
  5. Step 5: Solve for x
    x = 118,386,522,767.93/425,364.87
  6. Step 6: Final answer
    x = 278,317.59

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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.