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Finding the Fourth Proportional to 391,943.03, 588,013.25 and 111,460.28

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Solution

The fourth proportional to 391,943.03, 588,013.25 and 111,460.28 is: 167,218.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,943.03 : 588,013.25 = 111,460.28 : x
  2. Step 2: Convert to fraction form
    391,943.03/588,013.25 = 111,460.28/x
  3. Step 3: Cross multiply
    391,943.03x = 588,013.25 × 111,460.28
  4. Step 4: Simplify right side
    391,943.03x = 65,540,117,991.34
  5. Step 5: Solve for x
    x = 65,540,117,991.34/391,943.03
  6. Step 6: Final answer
    x = 167,218.48

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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.