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Finding the Fourth Proportional to 639,707.84, 959,893.85 and 260,906.48

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Solution

The fourth proportional to 639,707.84, 959,893.85 and 260,906.48 is: 391,495.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,707.84 : 959,893.85 = 260,906.48 : x
  2. Step 2: Convert to fraction form
    639,707.84/959,893.85 = 260,906.48/x
  3. Step 3: Cross multiply
    639,707.84x = 959,893.85 × 260,906.48
  4. Step 4: Simplify right side
    639,707.84x = 250,442,525,577.15
  5. Step 5: Solve for x
    x = 250,442,525,577.15/639,707.84
  6. Step 6: Final answer
    x = 391,495.16

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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.