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Finding the Fourth Proportional to 639,310.60, 958,965.90 and 266,062.60

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Solution

The fourth proportional to 639,310.60, 958,965.90 and 266,062.60 is: 399,093.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,310.60 : 958,965.90 = 266,062.60 : x
  2. Step 2: Convert to fraction form
    639,310.60/958,965.90 = 266,062.60/x
  3. Step 3: Cross multiply
    639,310.60x = 958,965.90 × 266,062.60
  4. Step 4: Simplify right side
    639,310.60x = 255,144,960,665.34
  5. Step 5: Solve for x
    x = 255,144,960,665.34/639,310.60
  6. Step 6: Final answer
    x = 399,093.90

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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.