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Finding the Fourth Proportional to 838.00, 1,257.07 and 290.23

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Solution

The fourth proportional to 838.00, 1,257.07 and 290.23 is: 435.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    838.00 : 1,257.07 = 290.23 : x
  2. Step 2: Convert to fraction form
    838.00/1,257.07 = 290.23/x
  3. Step 3: Cross multiply
    838.00x = 1,257.07 × 290.23
  4. Step 4: Simplify right side
    838.00x = 364,843.17
  5. Step 5: Solve for x
    x = 364,843.17/838.00
  6. Step 6: Final answer
    x = 435.38

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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.