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Finding the Fourth Proportional to 331,749.60, 497,624.40 and 82,431.60

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Solution

The fourth proportional to 331,749.60, 497,624.40 and 82,431.60 is: 123,647.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    331,749.60 : 497,624.40 = 82,431.60 : x
  2. Step 2: Convert to fraction form
    331,749.60/497,624.40 = 82,431.60/x
  3. Step 3: Cross multiply
    331,749.60x = 497,624.40 × 82,431.60
  4. Step 4: Simplify right side
    331,749.60x = 41,019,975,491.04
  5. Step 5: Solve for x
    x = 41,019,975,491.04/331,749.60
  6. Step 6: Final answer
    x = 123,647.40

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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.