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Finding the Fourth Proportional to 485,668.46, 670,645.45 and 304,691.50

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Solution

The fourth proportional to 485,668.46, 670,645.45 and 304,691.50 is: 420,739.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,668.46 : 670,645.45 = 304,691.50 : x
  2. Step 2: Convert to fraction form
    485,668.46/670,645.45 = 304,691.50/x
  3. Step 3: Cross multiply
    485,668.46x = 670,645.45 × 304,691.50
  4. Step 4: Simplify right side
    485,668.46x = 204,339,968,128.68
  5. Step 5: Solve for x
    x = 204,339,968,128.68/485,668.46
  6. Step 6: Final answer
    x = 420,739.63

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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.