Home / 3,345.40-5,012.70-2,189.80

Finding the Fourth Proportional to 3,345.40, 5,012.70 and 2,189.80

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Solution

The fourth proportional to 3,345.40, 5,012.70 and 2,189.80 is: 3,281.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,345.40 : 5,012.70 = 2,189.80 : x
  2. Step 2: Convert to fraction form
    3,345.40/5,012.70 = 2,189.80/x
  3. Step 3: Cross multiply
    3,345.40x = 5,012.70 × 2,189.80
  4. Step 4: Simplify right side
    3,345.40x = 10,976,810.46
  5. Step 5: Solve for x
    x = 10,976,810.46/3,345.40
  6. Step 6: Final answer
    x = 3,281.17

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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.