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Finding the Fourth Proportional to 994.49, 1,491.21 and 500.39

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Solution

The fourth proportional to 994.49, 1,491.21 and 500.39 is: 750.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    994.49 : 1,491.21 = 500.39 : x
  2. Step 2: Convert to fraction form
    994.49/1,491.21 = 500.39/x
  3. Step 3: Cross multiply
    994.49x = 1,491.21 × 500.39
  4. Step 4: Simplify right side
    994.49x = 746,179.12
  5. Step 5: Solve for x
    x = 746,179.12/994.49
  6. Step 6: Final answer
    x = 750.32

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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.