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Finding the Fourth Proportional to 355,826.01, 490,991.39 and 212,555.64

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Solution

The fourth proportional to 355,826.01, 490,991.39 and 212,555.64 is: 293,297.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    355,826.01 : 490,991.39 = 212,555.64 : x
  2. Step 2: Convert to fraction form
    355,826.01/490,991.39 = 212,555.64/x
  3. Step 3: Cross multiply
    355,826.01x = 490,991.39 × 212,555.64
  4. Step 4: Simplify right side
    355,826.01x = 104,362,988,073.16
  5. Step 5: Solve for x
    x = 104,362,988,073.16/355,826.01
  6. Step 6: Final answer
    x = 293,297.81

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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.