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Finding the Fourth Proportional to 479,380.05, 718,945.62 and 142,341.48

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Solution

The fourth proportional to 479,380.05, 718,945.62 and 142,341.48 is: 213,475.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    479,380.05 : 718,945.62 = 142,341.48 : x
  2. Step 2: Convert to fraction form
    479,380.05/718,945.62 = 142,341.48/x
  3. Step 3: Cross multiply
    479,380.05x = 718,945.62 × 142,341.48
  4. Step 4: Simplify right side
    479,380.05x = 102,335,783,590.32
  5. Step 5: Solve for x
    x = 102,335,783,590.32/479,380.05
  6. Step 6: Final answer
    x = 213,475.27

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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.