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Finding the Fourth Proportional to 1,326.92, 1,831.20 and 994.76

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Solution

The fourth proportional to 1,326.92, 1,831.20 and 994.76 is: 1,372.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,326.92 : 1,831.20 = 994.76 : x
  2. Step 2: Convert to fraction form
    1,326.92/1,831.20 = 994.76/x
  3. Step 3: Cross multiply
    1,326.92x = 1,831.20 × 994.76
  4. Step 4: Simplify right side
    1,326.92x = 1,821,604.51
  5. Step 5: Solve for x
    x = 1,821,604.51/1,326.92
  6. Step 6: Final answer
    x = 1,372.81

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Half scale
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Double scale
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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.