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Finding the Fourth Proportional to 994.17, 1,494.91 and 687.99

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Solution

The fourth proportional to 994.17, 1,494.91 and 687.99 is: 1,034.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    994.17 : 1,494.91 = 687.99 : x
  2. Step 2: Convert to fraction form
    994.17/1,494.91 = 687.99/x
  3. Step 3: Cross multiply
    994.17x = 1,494.91 × 687.99
  4. Step 4: Simplify right side
    994.17x = 1,028,485.73
  5. Step 5: Solve for x
    x = 1,028,485.73/994.17
  6. Step 6: Final answer
    x = 1,034.51

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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.