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Finding the Fourth Proportional to 1,831.74, 2,748.80 and 792.75

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Solution

The fourth proportional to 1,831.74, 2,748.80 and 792.75 is: 1,189.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,831.74 : 2,748.80 = 792.75 : x
  2. Step 2: Convert to fraction form
    1,831.74/2,748.80 = 792.75/x
  3. Step 3: Cross multiply
    1,831.74x = 2,748.80 × 792.75
  4. Step 4: Simplify right side
    1,831.74x = 2,179,111.20
  5. Step 5: Solve for x
    x = 2,179,111.20/1,831.74
  6. Step 6: Final answer
    x = 1,189.64

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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.