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Finding the Fourth Proportional to 306,619, 459,928.50 and 85,003

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Solution

The fourth proportional to 306,619, 459,928.50 and 85,003 is: 127,504.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    306,619 : 459,928.50 = 85,003 : x
  2. Step 2: Convert to fraction form
    306,619/459,928.50 = 85,003/x
  3. Step 3: Cross multiply
    306,619x = 459,928.50 × 85,003
  4. Step 4: Simplify right side
    306,619x = 39,095,302,285.50
  5. Step 5: Solve for x
    x = 39,095,302,285.50/306,619
  6. Step 6: Final answer
    x = 127,504.50

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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.