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Finding the Fourth Proportional to 994.21, 1,372.03 and 574.57

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Solution

The fourth proportional to 994.21, 1,372.03 and 574.57 is: 792.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    994.21 : 1,372.03 = 574.57 : x
  2. Step 2: Convert to fraction form
    994.21/1,372.03 = 574.57/x
  3. Step 3: Cross multiply
    994.21x = 1,372.03 × 574.57
  4. Step 4: Simplify right side
    994.21x = 788,327.56
  5. Step 5: Solve for x
    x = 788,327.56/994.21
  6. Step 6: Final answer
    x = 792.92

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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.