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Finding the Fourth Proportional to 3,189.90, 4,784.34 and 880.86

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Solution

The fourth proportional to 3,189.90, 4,784.34 and 880.86 is: 1,321.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,189.90 : 4,784.34 = 880.86 : x
  2. Step 2: Convert to fraction form
    3,189.90/4,784.34 = 880.86/x
  3. Step 3: Cross multiply
    3,189.90x = 4,784.34 × 880.86
  4. Step 4: Simplify right side
    3,189.90x = 4,214,333.73
  5. Step 5: Solve for x
    x = 4,214,333.73/3,189.90
  6. Step 6: Final answer
    x = 1,321.15

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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.