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Finding the Fourth Proportional to 746.56, 1,120.08 and 284.48

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Solution

The fourth proportional to 746.56, 1,120.08 and 284.48 is: 426.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    746.56 : 1,120.08 = 284.48 : x
  2. Step 2: Convert to fraction form
    746.56/1,120.08 = 284.48/x
  3. Step 3: Cross multiply
    746.56x = 1,120.08 × 284.48
  4. Step 4: Simplify right side
    746.56x = 318,640.36
  5. Step 5: Solve for x
    x = 318,640.36/746.56
  6. Step 6: Final answer
    x = 426.81

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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.