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Finding the Fourth Proportional to 744.06, 1,115.64 and 311.16

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Solution

The fourth proportional to 744.06, 1,115.64 and 311.16 is: 466.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    744.06 : 1,115.64 = 311.16 : x
  2. Step 2: Convert to fraction form
    744.06/1,115.64 = 311.16/x
  3. Step 3: Cross multiply
    744.06x = 1,115.64 × 311.16
  4. Step 4: Simplify right side
    744.06x = 347,142.54
  5. Step 5: Solve for x
    x = 347,142.54/744.06
  6. Step 6: Final answer
    x = 466.55

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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.