Home / 2,153.30-3,231.05-921.74

Finding the Fourth Proportional to 2,153.30, 3,231.05 and 921.74

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Solution

The fourth proportional to 2,153.30, 3,231.05 and 921.74 is: 1,383.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,153.30 : 3,231.05 = 921.74 : x
  2. Step 2: Convert to fraction form
    2,153.30/3,231.05 = 921.74/x
  3. Step 3: Cross multiply
    2,153.30x = 3,231.05 × 921.74
  4. Step 4: Simplify right side
    2,153.30x = 2,978,167.26
  5. Step 5: Solve for x
    x = 2,978,167.26/2,153.30
  6. Step 6: Final answer
    x = 1,383.07

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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.