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Finding the Fourth Proportional to 1,370.09, 2,054.91 and 395.98

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Solution

The fourth proportional to 1,370.09, 2,054.91 and 395.98 is: 593.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,370.09 : 2,054.91 = 395.98 : x
  2. Step 2: Convert to fraction form
    1,370.09/2,054.91 = 395.98/x
  3. Step 3: Cross multiply
    1,370.09x = 2,054.91 × 395.98
  4. Step 4: Simplify right side
    1,370.09x = 813,703.26
  5. Step 5: Solve for x
    x = 813,703.26/1,370.09
  6. Step 6: Final answer
    x = 593.90

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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.