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Finding the Fourth Proportional to 2,157.96, 3,236.45 and 841.75

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Solution

The fourth proportional to 2,157.96, 3,236.45 and 841.75 is: 1,262.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,157.96 : 3,236.45 = 841.75 : x
  2. Step 2: Convert to fraction form
    2,157.96/3,236.45 = 841.75/x
  3. Step 3: Cross multiply
    2,157.96x = 3,236.45 × 841.75
  4. Step 4: Simplify right side
    2,157.96x = 2,724,275.80
  5. Step 5: Solve for x
    x = 2,724,275.80/2,157.96
  6. Step 6: Final answer
    x = 1,262.43

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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.