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Finding the Fourth Proportional to 328,336.56, 492,258.60 and 139,018.80

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Solution

The fourth proportional to 328,336.56, 492,258.60 and 139,018.80 is: 208,423.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,336.56 : 492,258.60 = 139,018.80 : x
  2. Step 2: Convert to fraction form
    328,336.56/492,258.60 = 139,018.80/x
  3. Step 3: Cross multiply
    328,336.56x = 492,258.60 × 139,018.80
  4. Step 4: Simplify right side
    328,336.56x = 68,433,199,861.68
  5. Step 5: Solve for x
    x = 68,433,199,861.68/328,336.56
  6. Step 6: Final answer
    x = 208,423.94

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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.