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Finding the Fourth Proportional to 331,263.80, 496,652.70 and 131,485.40

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Solution

The fourth proportional to 331,263.80, 496,652.70 and 131,485.40 is: 197,131.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    331,263.80 : 496,652.70 = 131,485.40 : x
  2. Step 2: Convert to fraction form
    331,263.80/496,652.70 = 131,485.40/x
  3. Step 3: Cross multiply
    331,263.80x = 496,652.70 × 131,485.40
  4. Step 4: Simplify right side
    331,263.80x = 65,302,578,920.58
  5. Step 5: Solve for x
    x = 65,302,578,920.58/331,263.80
  6. Step 6: Final answer
    x = 197,131.65

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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.