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Finding the Fourth Proportional to 1,113, 1,667.74 and 746.44

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Solution

The fourth proportional to 1,113, 1,667.74 and 746.44 is: 1,118.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,113 : 1,667.74 = 746.44 : x
  2. Step 2: Convert to fraction form
    1,113/1,667.74 = 746.44/x
  3. Step 3: Cross multiply
    1,113x = 1,667.74 × 746.44
  4. Step 4: Simplify right side
    1,113x = 1,244,867.85
  5. Step 5: Solve for x
    x = 1,244,867.85/1,113
  6. Step 6: Final answer
    x = 1,118.48

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Double scale
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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.