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Finding the Fourth Proportional to 1,208,736.41, 1,668,077.42 and 664,895.12

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Solution

The fourth proportional to 1,208,736.41, 1,668,077.42 and 664,895.12 is: 917,566.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,208,736.41 : 1,668,077.42 = 664,895.12 : x
  2. Step 2: Convert to fraction form
    1,208,736.41/1,668,077.42 = 664,895.12/x
  3. Step 3: Cross multiply
    1,208,736.41x = 1,668,077.42 × 664,895.12
  4. Step 4: Simplify right side
    1,208,736.41x = 1,109,096,524,675.33
  5. Step 5: Solve for x
    x = 1,109,096,524,675.33/1,208,736.41
  6. Step 6: Final answer
    x = 917,566.91

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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.