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Finding the Fourth Proportional to 355,340.85, 490,372.34 and 200,294.56

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Solution

The fourth proportional to 355,340.85, 490,372.34 and 200,294.56 is: 276,407.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    355,340.85 : 490,372.34 = 200,294.56 : x
  2. Step 2: Convert to fraction form
    355,340.85/490,372.34 = 200,294.56/x
  3. Step 3: Cross multiply
    355,340.85x = 490,372.34 × 200,294.56
  4. Step 4: Simplify right side
    355,340.85x = 98,218,912,076.47
  5. Step 5: Solve for x
    x = 98,218,912,076.47/355,340.85
  6. Step 6: Final answer
    x = 276,407.60

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1.5x scale

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.