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Finding the Fourth Proportional to 993.64, 1,371.02 and 573.84

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Solution

The fourth proportional to 993.64, 1,371.02 and 573.84 is: 791.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    993.64 : 1,371.02 = 573.84 : x
  2. Step 2: Convert to fraction form
    993.64/1,371.02 = 573.84/x
  3. Step 3: Cross multiply
    993.64x = 1,371.02 × 573.84
  4. Step 4: Simplify right side
    993.64x = 786,746.12
  5. Step 5: Solve for x
    x = 786,746.12/993.64
  6. Step 6: Final answer
    x = 791.78

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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.