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Finding the Fourth Proportional to 994.91, 1,492.36 and 629.80

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Solution

The fourth proportional to 994.91, 1,492.36 and 629.80 is: 944.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    994.91 : 1,492.36 = 629.80 : x
  2. Step 2: Convert to fraction form
    994.91/1,492.36 = 629.80/x
  3. Step 3: Cross multiply
    994.91x = 1,492.36 × 629.80
  4. Step 4: Simplify right side
    994.91x = 939,883.02
  5. Step 5: Solve for x
    x = 939,883.02/994.91
  6. Step 6: Final answer
    x = 944.70

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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.