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Finding the Fourth Proportional to 1,369.44, 2,054.16 and 445.64

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Solution

The fourth proportional to 1,369.44, 2,054.16 and 445.64 is: 668.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,369.44 : 2,054.16 = 445.64 : x
  2. Step 2: Convert to fraction form
    1,369.44/2,054.16 = 445.64/x
  3. Step 3: Cross multiply
    1,369.44x = 2,054.16 × 445.64
  4. Step 4: Simplify right side
    1,369.44x = 915,405.59
  5. Step 5: Solve for x
    x = 915,405.59/1,369.44
  6. Step 6: Final answer
    x = 668.45

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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.