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Finding the Fourth Proportional to 3,287.16, 4,930.90 and 1,235

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Solution

The fourth proportional to 3,287.16, 4,930.90 and 1,235 is: 1,852.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,287.16 : 4,930.90 = 1,235 : x
  2. Step 2: Convert to fraction form
    3,287.16/4,930.90 = 1,235/x
  3. Step 3: Cross multiply
    3,287.16x = 4,930.90 × 1,235
  4. Step 4: Simplify right side
    3,287.16x = 6,089,661.50
  5. Step 5: Solve for x
    x = 6,089,661.50/3,287.16
  6. Step 6: Final answer
    x = 1,852.56

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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.