Home / 2,108.21-3,162.45-875.90

Finding the Fourth Proportional to 2,108.21, 3,162.45 and 875.90

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Solution

The fourth proportional to 2,108.21, 3,162.45 and 875.90 is: 1,313.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,108.21 : 3,162.45 = 875.90 : x
  2. Step 2: Convert to fraction form
    2,108.21/3,162.45 = 875.90/x
  3. Step 3: Cross multiply
    2,108.21x = 3,162.45 × 875.90
  4. Step 4: Simplify right side
    2,108.21x = 2,769,974.14
  5. Step 5: Solve for x
    x = 2,769,974.14/2,108.21
  6. Step 6: Final answer
    x = 1,313.90

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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.