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Finding the Fourth Proportional to 1,395.97, 1,926.36 and 836.31

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Solution

The fourth proportional to 1,395.97, 1,926.36 and 836.31 is: 1,154.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,395.97 : 1,926.36 = 836.31 : x
  2. Step 2: Convert to fraction form
    1,395.97/1,926.36 = 836.31/x
  3. Step 3: Cross multiply
    1,395.97x = 1,926.36 × 836.31
  4. Step 4: Simplify right side
    1,395.97x = 1,611,029.95
  5. Step 5: Solve for x
    x = 1,611,029.95/1,395.97
  6. Step 6: Final answer
    x = 1,154.06

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.