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Finding the Fourth Proportional to 1,604.61, 2,213.87 and 905.99

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Solution

The fourth proportional to 1,604.61, 2,213.87 and 905.99 is: 1,249.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,604.61 : 2,213.87 = 905.99 : x
  2. Step 2: Convert to fraction form
    1,604.61/2,213.87 = 905.99/x
  3. Step 3: Cross multiply
    1,604.61x = 2,213.87 × 905.99
  4. Step 4: Simplify right side
    1,604.61x = 2,005,728.48
  5. Step 5: Solve for x
    x = 2,005,728.48/1,604.61
  6. Step 6: Final answer
    x = 1,249.98

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.