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Finding the Fourth Proportional to 994.66, 1,491.14 and 628.63

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Solution

The fourth proportional to 994.66, 1,491.14 and 628.63 is: 942.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    994.66 : 1,491.14 = 628.63 : x
  2. Step 2: Convert to fraction form
    994.66/1,491.14 = 628.63/x
  3. Step 3: Cross multiply
    994.66x = 1,491.14 × 628.63
  4. Step 4: Simplify right side
    994.66x = 937,373.18
  5. Step 5: Solve for x
    x = 937,373.18/994.66
  6. Step 6: Final answer
    x = 942.41

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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.