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Finding the Fourth Proportional to 639,706.61, 959,892.01 and 260,905.25

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Solution

The fourth proportional to 639,706.61, 959,892.01 and 260,905.25 is: 391,493.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,706.61 : 959,892.01 = 260,905.25 : x
  2. Step 2: Convert to fraction form
    639,706.61/959,892.01 = 260,905.25/x
  3. Step 3: Cross multiply
    639,706.61x = 959,892.01 × 260,905.25
  4. Step 4: Simplify right side
    639,706.61x = 250,440,866,589.52
  5. Step 5: Solve for x
    x = 250,440,866,589.52/639,706.61
  6. Step 6: Final answer
    x = 391,493.32

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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.