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Finding the Fourth Proportional to 1,261.02, 1,891.63 and 395.33

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Solution

The fourth proportional to 1,261.02, 1,891.63 and 395.33 is: 593.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,261.02 : 1,891.63 = 395.33 : x
  2. Step 2: Convert to fraction form
    1,261.02/1,891.63 = 395.33/x
  3. Step 3: Cross multiply
    1,261.02x = 1,891.63 × 395.33
  4. Step 4: Simplify right side
    1,261.02x = 747,818.09
  5. Step 5: Solve for x
    x = 747,818.09/1,261.02
  6. Step 6: Final answer
    x = 593.03

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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.