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Finding the Fourth Proportional to 1,369.88, 2,054.22 and 395.76

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Solution

The fourth proportional to 1,369.88, 2,054.22 and 395.76 is: 593.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,369.88 : 2,054.22 = 395.76 : x
  2. Step 2: Convert to fraction form
    1,369.88/2,054.22 = 395.76/x
  3. Step 3: Cross multiply
    1,369.88x = 2,054.22 × 395.76
  4. Step 4: Simplify right side
    1,369.88x = 812,978.11
  5. Step 5: Solve for x
    x = 812,978.11/1,369.88
  6. Step 6: Final answer
    x = 593.47

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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.