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Finding the Fourth Proportional to 391,352.22, 587,043.63 and 121,508.37

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Solution

The fourth proportional to 391,352.22, 587,043.63 and 121,508.37 is: 182,267.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,352.22 : 587,043.63 = 121,508.37 : x
  2. Step 2: Convert to fraction form
    391,352.22/587,043.63 = 121,508.37/x
  3. Step 3: Cross multiply
    391,352.22x = 587,043.63 × 121,508.37
  4. Step 4: Simplify right side
    391,352.22x = 71,330,714,600.18
  5. Step 5: Solve for x
    x = 71,330,714,600.18/391,352.22
  6. Step 6: Final answer
    x = 182,267.31

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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.