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Finding the Fourth Proportional to 994.34, 1,370.73 and 890.66

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Solution

The fourth proportional to 994.34, 1,370.73 and 890.66 is: 1,227.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    994.34 : 1,370.73 = 890.66 : x
  2. Step 2: Convert to fraction form
    994.34/1,370.73 = 890.66/x
  3. Step 3: Cross multiply
    994.34x = 1,370.73 × 890.66
  4. Step 4: Simplify right side
    994.34x = 1,220,854.38
  5. Step 5: Solve for x
    x = 1,220,854.38/994.34
  6. Step 6: Final answer
    x = 1,227.80

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.