Home / 2,172.40-3,257.14-1,860.28

Finding the Fourth Proportional to 2,172.40, 3,257.14 and 1,860.28

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Solution

The fourth proportional to 2,172.40, 3,257.14 and 1,860.28 is: 2,789.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,172.40 : 3,257.14 = 1,860.28 : x
  2. Step 2: Convert to fraction form
    2,172.40/3,257.14 = 1,860.28/x
  3. Step 3: Cross multiply
    2,172.40x = 3,257.14 × 1,860.28
  4. Step 4: Simplify right side
    2,172.40x = 6,059,192.40
  5. Step 5: Solve for x
    x = 6,059,192.40/2,172.40
  6. Step 6: Final answer
    x = 2,789.17

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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.