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Finding the Fourth Proportional to 355,481.98, 490,570.96 and 212,254.54

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Solution

The fourth proportional to 355,481.98, 490,570.96 and 212,254.54 is: 292,914.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    355,481.98 : 490,570.96 = 212,254.54 : x
  2. Step 2: Convert to fraction form
    355,481.98/490,570.96 = 212,254.54/x
  3. Step 3: Cross multiply
    355,481.98x = 490,570.96 × 212,254.54
  4. Step 4: Simplify right side
    355,481.98x = 104,125,913,452.16
  5. Step 5: Solve for x
    x = 104,125,913,452.16/355,481.98
  6. Step 6: Final answer
    x = 292,914.74

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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.