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Finding the Fourth Proportional to 1,369.71, 2,054.61 and 395.91

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Solution

The fourth proportional to 1,369.71, 2,054.61 and 395.91 is: 593.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,369.71 : 2,054.61 = 395.91 : x
  2. Step 2: Convert to fraction form
    1,369.71/2,054.61 = 395.91/x
  3. Step 3: Cross multiply
    1,369.71x = 2,054.61 × 395.91
  4. Step 4: Simplify right side
    1,369.71x = 813,440.65
  5. Step 5: Solve for x
    x = 813,440.65/1,369.71
  6. Step 6: Final answer
    x = 593.88

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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.