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Finding the Fourth Proportional to 203,856.40, 305,784.60 and 185,485.60

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Solution

The fourth proportional to 203,856.40, 305,784.60 and 185,485.60 is: 278,228.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,856.40 : 305,784.60 = 185,485.60 : x
  2. Step 2: Convert to fraction form
    203,856.40/305,784.60 = 185,485.60/x
  3. Step 3: Cross multiply
    203,856.40x = 305,784.60 × 185,485.60
  4. Step 4: Simplify right side
    203,856.40x = 56,718,640,001.76
  5. Step 5: Solve for x
    x = 56,718,640,001.76/203,856.40
  6. Step 6: Final answer
    x = 278,228.40

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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.