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Finding the Fourth Proportional to 355,239.30, 490,447.48 and 231,178.49

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Solution

The fourth proportional to 355,239.30, 490,447.48 and 231,178.49 is: 319,167.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    355,239.30 : 490,447.48 = 231,178.49 : x
  2. Step 2: Convert to fraction form
    355,239.30/490,447.48 = 231,178.49/x
  3. Step 3: Cross multiply
    355,239.30x = 490,447.48 × 231,178.49
  4. Step 4: Simplify right side
    355,239.30x = 113,380,907,850.71
  5. Step 5: Solve for x
    x = 113,380,907,850.71/355,239.30
  6. Step 6: Final answer
    x = 319,167.69

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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.