Home / 2,150.42-3,225.64-689.69

Finding the Fourth Proportional to 2,150.42, 3,225.64 and 689.69

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Solution

The fourth proportional to 2,150.42, 3,225.64 and 689.69 is: 1,034.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,150.42 : 3,225.64 = 689.69 : x
  2. Step 2: Convert to fraction form
    2,150.42/3,225.64 = 689.69/x
  3. Step 3: Cross multiply
    2,150.42x = 3,225.64 × 689.69
  4. Step 4: Simplify right side
    2,150.42x = 2,224,697.99
  5. Step 5: Solve for x
    x = 2,224,697.99/2,150.42
  6. Step 6: Final answer
    x = 1,034.54

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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.