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Finding the Fourth Proportional to 3,190.67, 4,785.69 and 999.34

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Solution

The fourth proportional to 3,190.67, 4,785.69 and 999.34 is: 1,498.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,190.67 : 4,785.69 = 999.34 : x
  2. Step 2: Convert to fraction form
    3,190.67/4,785.69 = 999.34/x
  3. Step 3: Cross multiply
    3,190.67x = 4,785.69 × 999.34
  4. Step 4: Simplify right side
    3,190.67x = 4,782,531.44
  5. Step 5: Solve for x
    x = 4,782,531.44/3,190.67
  6. Step 6: Final answer
    x = 1,498.91

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1.5x scale

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.