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Finding the Fourth Proportional to 939.21, 1,284.61 and 924.09

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Solution

The fourth proportional to 939.21, 1,284.61 and 924.09 is: 1,263.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    939.21 : 1,284.61 = 924.09 : x
  2. Step 2: Convert to fraction form
    939.21/1,284.61 = 924.09/x
  3. Step 3: Cross multiply
    939.21x = 1,284.61 × 924.09
  4. Step 4: Simplify right side
    939.21x = 1,187,092.94
  5. Step 5: Solve for x
    x = 1,187,092.94/939.21
  6. Step 6: Final answer
    x = 1,263.93

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These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.