Home / 2,089.12-3,134.30-628.40

Finding the Fourth Proportional to 2,089.12, 3,134.30 and 628.40

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Solution

The fourth proportional to 2,089.12, 3,134.30 and 628.40 is: 942.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,089.12 : 3,134.30 = 628.40 : x
  2. Step 2: Convert to fraction form
    2,089.12/3,134.30 = 628.40/x
  3. Step 3: Cross multiply
    2,089.12x = 3,134.30 × 628.40
  4. Step 4: Simplify right side
    2,089.12x = 1,969,594.12
  5. Step 5: Solve for x
    x = 1,969,594.12/2,089.12
  6. Step 6: Final answer
    x = 942.79

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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.