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Finding the Fourth Proportional to 639,706.38, 959,891.67 and 260,905.02

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Solution

The fourth proportional to 639,706.38, 959,891.67 and 260,905.02 is: 391,492.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,706.38 : 959,891.67 = 260,905.02 : x
  2. Step 2: Convert to fraction form
    639,706.38/959,891.67 = 260,905.02/x
  3. Step 3: Cross multiply
    639,706.38x = 959,891.67 × 260,905.02
  4. Step 4: Simplify right side
    639,706.38x = 250,440,555,359.18
  5. Step 5: Solve for x
    x = 250,440,555,359.18/639,706.38
  6. Step 6: Final answer
    x = 391,492.98

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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.