Home / 1,719.64-2,579.38-421.04

Finding the Fourth Proportional to 1,719.64, 2,579.38 and 421.04

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Solution

The fourth proportional to 1,719.64, 2,579.38 and 421.04 is: 631.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,719.64 : 2,579.38 = 421.04 : x
  2. Step 2: Convert to fraction form
    1,719.64/2,579.38 = 421.04/x
  3. Step 3: Cross multiply
    1,719.64x = 2,579.38 × 421.04
  4. Step 4: Simplify right side
    1,719.64x = 1,086,022.16
  5. Step 5: Solve for x
    x = 1,086,022.16/1,719.64
  6. Step 6: Final answer
    x = 631.54

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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.