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Finding the Fourth Proportional to 445,455, 667,865.07 and 208,668.54

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Solution

The fourth proportional to 445,455, 667,865.07 and 208,668.54 is: 312,854.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    445,455 : 667,865.07 = 208,668.54 : x
  2. Step 2: Convert to fraction form
    445,455/667,865.07 = 208,668.54/x
  3. Step 3: Cross multiply
    445,455x = 667,865.07 × 208,668.54
  4. Step 4: Simplify right side
    445,455x = 139,362,429,073.90
  5. Step 5: Solve for x
    x = 139,362,429,073.90/445,455
  6. Step 6: Final answer
    x = 312,854.11

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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.