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Finding the Fourth Proportional to 2,172.94, 3,257.19 and 856.17

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Solution

The fourth proportional to 2,172.94, 3,257.19 and 856.17 is: 1,283.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,172.94 : 3,257.19 = 856.17 : x
  2. Step 2: Convert to fraction form
    2,172.94/3,257.19 = 856.17/x
  3. Step 3: Cross multiply
    2,172.94x = 3,257.19 × 856.17
  4. Step 4: Simplify right side
    2,172.94x = 2,788,687.80
  5. Step 5: Solve for x
    x = 2,788,687.80/2,172.94
  6. Step 6: Final answer
    x = 1,283.37

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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.