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Finding the Fourth Proportional to 303,960.60, 455,940.90 and 279,077.40

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Solution

The fourth proportional to 303,960.60, 455,940.90 and 279,077.40 is: 418,616.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,960.60 : 455,940.90 = 279,077.40 : x
  2. Step 2: Convert to fraction form
    303,960.60/455,940.90 = 279,077.40/x
  3. Step 3: Cross multiply
    303,960.60x = 455,940.90 × 279,077.40
  4. Step 4: Simplify right side
    303,960.60x = 127,242,800,925.66
  5. Step 5: Solve for x
    x = 127,242,800,925.66/303,960.60
  6. Step 6: Final answer
    x = 418,616.10

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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.