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Finding the Fourth Proportional to 1,284.93, 1,926.72 and 822.60

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Solution

The fourth proportional to 1,284.93, 1,926.72 and 822.60 is: 1,233.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,284.93 : 1,926.72 = 822.60 : x
  2. Step 2: Convert to fraction form
    1,284.93/1,926.72 = 822.60/x
  3. Step 3: Cross multiply
    1,284.93x = 1,926.72 × 822.60
  4. Step 4: Simplify right side
    1,284.93x = 1,584,919.87
  5. Step 5: Solve for x
    x = 1,584,919.87/1,284.93
  6. Step 6: Final answer
    x = 1,233.47

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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.