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Finding the Fourth Proportional to 1,369.39, 2,054.10 and 395.50

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Solution

The fourth proportional to 1,369.39, 2,054.10 and 395.50 is: 593.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,369.39 : 2,054.10 = 395.50 : x
  2. Step 2: Convert to fraction form
    1,369.39/2,054.10 = 395.50/x
  3. Step 3: Cross multiply
    1,369.39x = 2,054.10 × 395.50
  4. Step 4: Simplify right side
    1,369.39x = 812,396.55
  5. Step 5: Solve for x
    x = 812,396.55/1,369.39
  6. Step 6: Final answer
    x = 593.25

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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.