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Finding the Fourth Proportional to 1,369.88, 2,054.93 and 445.42

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Solution

The fourth proportional to 1,369.88, 2,054.93 and 445.42 is: 668.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,369.88 : 2,054.93 = 445.42 : x
  2. Step 2: Convert to fraction form
    1,369.88/2,054.93 = 445.42/x
  3. Step 3: Cross multiply
    1,369.88x = 2,054.93 × 445.42
  4. Step 4: Simplify right side
    1,369.88x = 915,298.21
  5. Step 5: Solve for x
    x = 915,298.21/1,369.88
  6. Step 6: Final answer
    x = 668.16

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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.