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Finding the Fourth Proportional to 485,005.92, 669,308.30 and 281,174.98

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Solution

The fourth proportional to 485,005.92, 669,308.30 and 281,174.98 is: 388,021.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,005.92 : 669,308.30 = 281,174.98 : x
  2. Step 2: Convert to fraction form
    485,005.92/669,308.30 = 281,174.98/x
  3. Step 3: Cross multiply
    485,005.92x = 669,308.30 × 281,174.98
  4. Step 4: Simplify right side
    485,005.92x = 188,192,747,866.33
  5. Step 5: Solve for x
    x = 188,192,747,866.33/485,005.92
  6. Step 6: Final answer
    x = 388,021.55

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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.