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Finding the Fourth Proportional to 306,640.80, 459,928.85 and 82,023.90

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Solution

The fourth proportional to 306,640.80, 459,928.85 and 82,023.90 is: 123,027.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    306,640.80 : 459,928.85 = 82,023.90 : x
  2. Step 2: Convert to fraction form
    306,640.80/459,928.85 = 82,023.90/x
  3. Step 3: Cross multiply
    306,640.80x = 459,928.85 × 82,023.90
  4. Step 4: Simplify right side
    306,640.80x = 37,725,157,999.52
  5. Step 5: Solve for x
    x = 37,725,157,999.52/306,640.80
  6. Step 6: Final answer
    x = 123,027.20

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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.