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Finding the Fourth Proportional to 391,556, 540,301.44 and 230,375.60

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Solution

The fourth proportional to 391,556, 540,301.44 and 230,375.60 is: 317,891.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,556 : 540,301.44 = 230,375.60 : x
  2. Step 2: Convert to fraction form
    391,556/540,301.44 = 230,375.60/x
  3. Step 3: Cross multiply
    391,556x = 540,301.44 × 230,375.60
  4. Step 4: Simplify right side
    391,556x = 124,472,268,420.86
  5. Step 5: Solve for x
    x = 124,472,268,420.86/391,556
  6. Step 6: Final answer
    x = 317,891.36

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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.