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Finding the Fourth Proportional to 994.04, 1,372.23 and 679.82

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Solution

The fourth proportional to 994.04, 1,372.23 and 679.82 is: 938.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    994.04 : 1,372.23 = 679.82 : x
  2. Step 2: Convert to fraction form
    994.04/1,372.23 = 679.82/x
  3. Step 3: Cross multiply
    994.04x = 1,372.23 × 679.82
  4. Step 4: Simplify right side
    994.04x = 932,862.54
  5. Step 5: Solve for x
    x = 932,862.54/994.04
  6. Step 6: Final answer
    x = 938.45

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1.5x scale

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.