Home / 2,108.68-3,162.20-875.45

Finding the Fourth Proportional to 2,108.68, 3,162.20 and 875.45

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Solution

The fourth proportional to 2,108.68, 3,162.20 and 875.45 is: 1,312.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,108.68 : 3,162.20 = 875.45 : x
  2. Step 2: Convert to fraction form
    2,108.68/3,162.20 = 875.45/x
  3. Step 3: Cross multiply
    2,108.68x = 3,162.20 × 875.45
  4. Step 4: Simplify right side
    2,108.68x = 2,768,347.99
  5. Step 5: Solve for x
    x = 2,768,347.99/2,108.68
  6. Step 6: Final answer
    x = 1,312.83

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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.