Home / 1,719.97-2,579.94-421.43

Finding the Fourth Proportional to 1,719.97, 2,579.94 and 421.43

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Solution

The fourth proportional to 1,719.97, 2,579.94 and 421.43 is: 632.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,719.97 : 2,579.94 = 421.43 : x
  2. Step 2: Convert to fraction form
    1,719.97/2,579.94 = 421.43/x
  3. Step 3: Cross multiply
    1,719.97x = 2,579.94 × 421.43
  4. Step 4: Simplify right side
    1,719.97x = 1,087,251.21
  5. Step 5: Solve for x
    x = 1,087,251.21/1,719.97
  6. Step 6: Final answer
    x = 632.13

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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.