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Finding the Fourth Proportional to 1,326.73, 1,830.08 and 855.25

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Solution

The fourth proportional to 1,326.73, 1,830.08 and 855.25 is: 1,179.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,326.73 : 1,830.08 = 855.25 : x
  2. Step 2: Convert to fraction form
    1,326.73/1,830.08 = 855.25/x
  3. Step 3: Cross multiply
    1,326.73x = 1,830.08 × 855.25
  4. Step 4: Simplify right side
    1,326.73x = 1,565,171.64
  5. Step 5: Solve for x
    x = 1,565,171.64/1,326.73
  6. Step 6: Final answer
    x = 1,179.72

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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.