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Finding the Fourth Proportional to 274,579.40, 411,431.70 and 203,720.60

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Solution

The fourth proportional to 274,579.40, 411,431.70 and 203,720.60 is: 305,256.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    274,579.40 : 411,431.70 = 203,720.60 : x
  2. Step 2: Convert to fraction form
    274,579.40/411,431.70 = 203,720.60/x
  3. Step 3: Cross multiply
    274,579.40x = 411,431.70 × 203,720.60
  4. Step 4: Simplify right side
    274,579.40x = 83,817,112,783.02
  5. Step 5: Solve for x
    x = 83,817,112,783.02/274,579.40
  6. Step 6: Final answer
    x = 305,256.38

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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.