Home / 3,420.24-5,127.66-1,339.89

Finding the Fourth Proportional to 3,420.24, 5,127.66 and 1,339.89

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Solution

The fourth proportional to 3,420.24, 5,127.66 and 1,339.89 is: 2,008.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,420.24 : 5,127.66 = 1,339.89 : x
  2. Step 2: Convert to fraction form
    3,420.24/5,127.66 = 1,339.89/x
  3. Step 3: Cross multiply
    3,420.24x = 5,127.66 × 1,339.89
  4. Step 4: Simplify right side
    3,420.24x = 6,870,500.36
  5. Step 5: Solve for x
    x = 6,870,500.36/3,420.24
  6. Step 6: Final answer
    x = 2,008.78

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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.