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Finding the Fourth Proportional to 383,620.82, 529,428.26 and 211,572.44

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Solution

The fourth proportional to 383,620.82, 529,428.26 and 211,572.44 is: 291,987.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    383,620.82 : 529,428.26 = 211,572.44 : x
  2. Step 2: Convert to fraction form
    383,620.82/529,428.26 = 211,572.44/x
  3. Step 3: Cross multiply
    383,620.82x = 529,428.26 × 211,572.44
  4. Step 4: Simplify right side
    383,620.82x = 112,012,428,773.15
  5. Step 5: Solve for x
    x = 112,012,428,773.15/383,620.82
  6. Step 6: Final answer
    x = 291,987.36

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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.