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Finding the Fourth Proportional to 303,969.60, 455,954.40 and 279,475.20

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Solution

The fourth proportional to 303,969.60, 455,954.40 and 279,475.20 is: 419,212.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,969.60 : 455,954.40 = 279,475.20 : x
  2. Step 2: Convert to fraction form
    303,969.60/455,954.40 = 279,475.20/x
  3. Step 3: Cross multiply
    303,969.60x = 455,954.40 × 279,475.20
  4. Step 4: Simplify right side
    303,969.60x = 127,427,947,130.88
  5. Step 5: Solve for x
    x = 127,427,947,130.88/303,969.60
  6. Step 6: Final answer
    x = 419,212.80

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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.