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Finding the Fourth Proportional to 911,105.28, 1,366,199.12 and 303,678.48

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Solution

The fourth proportional to 911,105.28, 1,366,199.12 and 303,678.48 is: 455,364.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    911,105.28 : 1,366,199.12 = 303,678.48 : x
  2. Step 2: Convert to fraction form
    911,105.28/1,366,199.12 = 303,678.48/x
  3. Step 3: Cross multiply
    911,105.28x = 1,366,199.12 × 303,678.48
  4. Step 4: Simplify right side
    911,105.28x = 414,885,272,138.94
  5. Step 5: Solve for x
    x = 414,885,272,138.94/911,105.28
  6. Step 6: Final answer
    x = 455,364.80

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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.