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Finding the Fourth Proportional to 303,974.60, 455,961.90 and 279,091.40

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Solution

The fourth proportional to 303,974.60, 455,961.90 and 279,091.40 is: 418,637.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,974.60 : 455,961.90 = 279,091.40 : x
  2. Step 2: Convert to fraction form
    303,974.60/455,961.90 = 279,091.40/x
  3. Step 3: Cross multiply
    303,974.60x = 455,961.90 × 279,091.40
  4. Step 4: Simplify right side
    303,974.60x = 127,255,045,017.66
  5. Step 5: Solve for x
    x = 127,255,045,017.66/303,974.60
  6. Step 6: Final answer
    x = 418,637.10

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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.