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Finding the Fourth Proportional to 391,754.69, 587,615.61 and 125,509.31

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Solution

The fourth proportional to 391,754.69, 587,615.61 and 125,509.31 is: 188,258.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,754.69 : 587,615.61 = 125,509.31 : x
  2. Step 2: Convert to fraction form
    391,754.69/587,615.61 = 125,509.31/x
  3. Step 3: Cross multiply
    391,754.69x = 587,615.61 × 125,509.31
  4. Step 4: Simplify right side
    391,754.69x = 73,751,231,225.37
  5. Step 5: Solve for x
    x = 73,751,231,225.37/391,754.69
  6. Step 6: Final answer
    x = 188,258.71

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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.