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Finding the Fourth Proportional to 1,261.56, 1,892.52 and 395.58

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Solution

The fourth proportional to 1,261.56, 1,892.52 and 395.58 is: 593.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,261.56 : 1,892.52 = 395.58 : x
  2. Step 2: Convert to fraction form
    1,261.56/1,892.52 = 395.58/x
  3. Step 3: Cross multiply
    1,261.56x = 1,892.52 × 395.58
  4. Step 4: Simplify right side
    1,261.56x = 748,643.06
  5. Step 5: Solve for x
    x = 748,643.06/1,261.56
  6. Step 6: Final answer
    x = 593.43

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.