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Finding the Fourth Proportional to 639,735.84, 959,604.96 and 166,420.44

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Solution

The fourth proportional to 639,735.84, 959,604.96 and 166,420.44 is: 249,630.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,735.84 : 959,604.96 = 166,420.44 : x
  2. Step 2: Convert to fraction form
    639,735.84/959,604.96 = 166,420.44/x
  3. Step 3: Cross multiply
    639,735.84x = 959,604.96 × 166,420.44
  4. Step 4: Simplify right side
    639,735.84x = 159,697,879,669.38
  5. Step 5: Solve for x
    x = 159,697,879,669.38/639,735.84
  6. Step 6: Final answer
    x = 249,630.97

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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.