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Finding the Fourth Proportional to 1,369.96, 2,055.20 and 445.44

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Solution

The fourth proportional to 1,369.96, 2,055.20 and 445.44 is: 668.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,369.96 : 2,055.20 = 445.44 : x
  2. Step 2: Convert to fraction form
    1,369.96/2,055.20 = 445.44/x
  3. Step 3: Cross multiply
    1,369.96x = 2,055.20 × 445.44
  4. Step 4: Simplify right side
    1,369.96x = 915,468.29
  5. Step 5: Solve for x
    x = 915,468.29/1,369.96
  6. Step 6: Final answer
    x = 668.24

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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.