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Finding the Fourth Proportional to 445,798.89, 668,960.78 and 165,512.97

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Solution

The fourth proportional to 445,798.89, 668,960.78 and 165,512.97 is: 248,366.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    445,798.89 : 668,960.78 = 165,512.97 : x
  2. Step 2: Convert to fraction form
    445,798.89/668,960.78 = 165,512.97/x
  3. Step 3: Cross multiply
    445,798.89x = 668,960.78 × 165,512.97
  4. Step 4: Simplify right side
    445,798.89x = 110,721,684,683.75
  5. Step 5: Solve for x
    x = 110,721,684,683.75/445,798.89
  6. Step 6: Final answer
    x = 248,366.89

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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.