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Finding the Fourth Proportional to 1,724.81, 2,380.25 and 938.87

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Solution

The fourth proportional to 1,724.81, 2,380.25 and 938.87 is: 1,295.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,724.81 : 2,380.25 = 938.87 : x
  2. Step 2: Convert to fraction form
    1,724.81/2,380.25 = 938.87/x
  3. Step 3: Cross multiply
    1,724.81x = 2,380.25 × 938.87
  4. Step 4: Simplify right side
    1,724.81x = 2,234,735.76
  5. Step 5: Solve for x
    x = 2,234,735.76/1,724.81
  6. Step 6: Final answer
    x = 1,295.64

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.