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Finding the Fourth Proportional to 331,090.40, 496,635.60 and 131,458.40

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Solution

The fourth proportional to 331,090.40, 496,635.60 and 131,458.40 is: 197,187.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    331,090.40 : 496,635.60 = 131,458.40 : x
  2. Step 2: Convert to fraction form
    331,090.40/496,635.60 = 131,458.40/x
  3. Step 3: Cross multiply
    331,090.40x = 496,635.60 × 131,458.40
  4. Step 4: Simplify right side
    331,090.40x = 65,286,921,359.04
  5. Step 5: Solve for x
    x = 65,286,921,359.04/331,090.40
  6. Step 6: Final answer
    x = 197,187.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.