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Finding the Fourth Proportional to 994.76, 1,491.24 and 912.76

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Solution

The fourth proportional to 994.76, 1,491.24 and 912.76 is: 1,368.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    994.76 : 1,491.24 = 912.76 : x
  2. Step 2: Convert to fraction form
    994.76/1,491.24 = 912.76/x
  3. Step 3: Cross multiply
    994.76x = 1,491.24 × 912.76
  4. Step 4: Simplify right side
    994.76x = 1,361,144.22
  5. Step 5: Solve for x
    x = 1,361,144.22/994.76
  6. Step 6: Final answer
    x = 1,368.31

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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.