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Finding the Fourth Proportional to 993.42, 1,370.76 and 573.72

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Solution

The fourth proportional to 993.42, 1,370.76 and 573.72 is: 791.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    993.42 : 1,370.76 = 573.72 : x
  2. Step 2: Convert to fraction form
    993.42/1,370.76 = 573.72/x
  3. Step 3: Cross multiply
    993.42x = 1,370.76 × 573.72
  4. Step 4: Simplify right side
    993.42x = 786,432.43
  5. Step 5: Solve for x
    x = 786,432.43/993.42
  6. Step 6: Final answer
    x = 791.64

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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.