Home / 2,152.12-3,228.18-691.39

Finding the Fourth Proportional to 2,152.12, 3,228.18 and 691.39

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Solution

The fourth proportional to 2,152.12, 3,228.18 and 691.39 is: 1,037.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,152.12 : 3,228.18 = 691.39 : x
  2. Step 2: Convert to fraction form
    2,152.12/3,228.18 = 691.39/x
  3. Step 3: Cross multiply
    2,152.12x = 3,228.18 × 691.39
  4. Step 4: Simplify right side
    2,152.12x = 2,231,931.37
  5. Step 5: Solve for x
    x = 2,231,931.37/2,152.12
  6. Step 6: Final answer
    x = 1,037.09

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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.