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Finding the Fourth Proportional to 421,404.22, 581,540.40 and 230,418.37

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Solution

The fourth proportional to 421,404.22, 581,540.40 and 230,418.37 is: 317,978.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,404.22 : 581,540.40 = 230,418.37 : x
  2. Step 2: Convert to fraction form
    421,404.22/581,540.40 = 230,418.37/x
  3. Step 3: Cross multiply
    421,404.22x = 581,540.40 × 230,418.37
  4. Step 4: Simplify right side
    421,404.22x = 133,997,586,997.35
  5. Step 5: Solve for x
    x = 133,997,586,997.35/421,404.22
  6. Step 6: Final answer
    x = 317,978.75

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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.