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Finding the Fourth Proportional to 488,780.56, 674,324.68 and 304,912.12

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Solution

The fourth proportional to 488,780.56, 674,324.68 and 304,912.12 is: 420,658.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    488,780.56 : 674,324.68 = 304,912.12 : x
  2. Step 2: Convert to fraction form
    488,780.56/674,324.68 = 304,912.12/x
  3. Step 3: Cross multiply
    488,780.56x = 674,324.68 × 304,912.12
  4. Step 4: Simplify right side
    488,780.56x = 205,609,767,747.12
  5. Step 5: Solve for x
    x = 205,609,767,747.12/488,780.56
  6. Step 6: Final answer
    x = 420,658.64

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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.