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Finding the Fourth Proportional to 391,678.03, 587,551.22 and 111,195.28

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Solution

The fourth proportional to 391,678.03, 587,551.22 and 111,195.28 is: 166,802.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,678.03 : 587,551.22 = 111,195.28 : x
  2. Step 2: Convert to fraction form
    391,678.03/587,551.22 = 111,195.28/x
  3. Step 3: Cross multiply
    391,678.03x = 587,551.22 × 111,195.28
  4. Step 4: Simplify right side
    391,678.03x = 65,332,923,017.69
  5. Step 5: Solve for x
    x = 65,332,923,017.69/391,678.03
  6. Step 6: Final answer
    x = 166,802.62

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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.