Home / 3,426.12-5,139.48-1,478.40

Finding the Fourth Proportional to 3,426.12, 5,139.48 and 1,478.40

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Solution

The fourth proportional to 3,426.12, 5,139.48 and 1,478.40 is: 2,217.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,426.12 : 5,139.48 = 1,478.40 : x
  2. Step 2: Convert to fraction form
    3,426.12/5,139.48 = 1,478.40/x
  3. Step 3: Cross multiply
    3,426.12x = 5,139.48 × 1,478.40
  4. Step 4: Simplify right side
    3,426.12x = 7,598,207.23
  5. Step 5: Solve for x
    x = 7,598,207.23/3,426.12
  6. Step 6: Final answer
    x = 2,217.73

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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.