Home / 3,426.40-5,139.79-1,672.90

Finding the Fourth Proportional to 3,426.40, 5,139.79 and 1,672.90

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Solution

The fourth proportional to 3,426.40, 5,139.79 and 1,672.90 is: 2,509.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,426.40 : 5,139.79 = 1,672.90 : x
  2. Step 2: Convert to fraction form
    3,426.40/5,139.79 = 1,672.90/x
  3. Step 3: Cross multiply
    3,426.40x = 5,139.79 × 1,672.90
  4. Step 4: Simplify right side
    3,426.40x = 8,598,320.63
  5. Step 5: Solve for x
    x = 8,598,320.63/3,426.40
  6. Step 6: Final answer
    x = 2,509.44

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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.