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Finding the Fourth Proportional to 742.11, 1,112.60 and 366.64

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Solution

The fourth proportional to 742.11, 1,112.60 and 366.64 is: 549.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    742.11 : 1,112.60 = 366.64 : x
  2. Step 2: Convert to fraction form
    742.11/1,112.60 = 366.64/x
  3. Step 3: Cross multiply
    742.11x = 1,112.60 × 366.64
  4. Step 4: Simplify right side
    742.11x = 407,928.06
  5. Step 5: Solve for x
    x = 407,928.06/742.11
  6. Step 6: Final answer
    x = 549.69

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.