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Finding the Fourth Proportional to 355,325.11, 490,191.15 and 212,001.82

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Solution

The fourth proportional to 355,325.11, 490,191.15 and 212,001.82 is: 292,468.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    355,325.11 : 490,191.15 = 212,001.82 : x
  2. Step 2: Convert to fraction form
    355,325.11/490,191.15 = 212,001.82/x
  3. Step 3: Cross multiply
    355,325.11x = 490,191.15 × 212,001.82
  4. Step 4: Simplify right side
    355,325.11x = 103,921,415,947.89
  5. Step 5: Solve for x
    x = 103,921,415,947.89/355,325.11
  6. Step 6: Final answer
    x = 292,468.54

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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.