Home / 3,420.14-5,131.59-1,340.30

Finding the Fourth Proportional to 3,420.14, 5,131.59 and 1,340.30

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Solution

The fourth proportional to 3,420.14, 5,131.59 and 1,340.30 is: 2,010.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,420.14 : 5,131.59 = 1,340.30 : x
  2. Step 2: Convert to fraction form
    3,420.14/5,131.59 = 1,340.30/x
  3. Step 3: Cross multiply
    3,420.14x = 5,131.59 × 1,340.30
  4. Step 4: Simplify right side
    3,420.14x = 6,877,870.08
  5. Step 5: Solve for x
    x = 6,877,870.08/3,420.14
  6. Step 6: Final answer
    x = 2,010.99

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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.