Home / 2,153.22-3,228.24-691.54

Finding the Fourth Proportional to 2,153.22, 3,228.24 and 691.54

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Solution

The fourth proportional to 2,153.22, 3,228.24 and 691.54 is: 1,036.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,153.22 : 3,228.24 = 691.54 : x
  2. Step 2: Convert to fraction form
    2,153.22/3,228.24 = 691.54/x
  3. Step 3: Cross multiply
    2,153.22x = 3,228.24 × 691.54
  4. Step 4: Simplify right side
    2,153.22x = 2,232,457.09
  5. Step 5: Solve for x
    x = 2,232,457.09/2,153.22
  6. Step 6: Final answer
    x = 1,036.80

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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.