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Finding the Fourth Proportional to 1,724.86, 2,380.32 and 938.91

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Solution

The fourth proportional to 1,724.86, 2,380.32 and 938.91 is: 1,295.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,724.86 : 2,380.32 = 938.91 : x
  2. Step 2: Convert to fraction form
    1,724.86/2,380.32 = 938.91/x
  3. Step 3: Cross multiply
    1,724.86x = 2,380.32 × 938.91
  4. Step 4: Simplify right side
    1,724.86x = 2,234,901.56
  5. Step 5: Solve for x
    x = 2,234,901.56/1,724.86
  6. Step 6: Final answer
    x = 1,295.70

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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.