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Finding the Fourth Proportional to 355,293.90, 490,333.53 and 202,338.56

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Solution

The fourth proportional to 355,293.90, 490,333.53 and 202,338.56 is: 279,243.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    355,293.90 : 490,333.53 = 202,338.56 : x
  2. Step 2: Convert to fraction form
    355,293.90/490,333.53 = 202,338.56/x
  3. Step 3: Cross multiply
    355,293.90x = 490,333.53 × 202,338.56
  4. Step 4: Simplify right side
    355,293.90x = 99,213,377,928.25
  5. Step 5: Solve for x
    x = 99,213,377,928.25/355,293.90
  6. Step 6: Final answer
    x = 279,243.12

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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.