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Finding the Fourth Proportional to 488,489.96, 674,445.12 and 305,007.90

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Solution

The fourth proportional to 488,489.96, 674,445.12 and 305,007.90 is: 421,116.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    488,489.96 : 674,445.12 = 305,007.90 : x
  2. Step 2: Convert to fraction form
    488,489.96/674,445.12 = 305,007.90/x
  3. Step 3: Cross multiply
    488,489.96x = 674,445.12 × 305,007.90
  4. Step 4: Simplify right side
    488,489.96x = 205,711,089,716.45
  5. Step 5: Solve for x
    x = 205,711,089,716.45/488,489.96
  6. Step 6: Final answer
    x = 421,116.31

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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.