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Finding the Fourth Proportional to 391,679.03, 587,552.72 and 111,196.28

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Solution

The fourth proportional to 391,679.03, 587,552.72 and 111,196.28 is: 166,804.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,679.03 : 587,552.72 = 111,196.28 : x
  2. Step 2: Convert to fraction form
    391,679.03/587,552.72 = 111,196.28/x
  3. Step 3: Cross multiply
    391,679.03x = 587,552.72 × 111,196.28
  4. Step 4: Simplify right side
    391,679.03x = 65,333,676,767.88
  5. Step 5: Solve for x
    x = 65,333,676,767.88/391,679.03
  6. Step 6: Final answer
    x = 166,804.12

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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.