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Finding the Fourth Proportional to 639,642.34, 959,467.02 and 265,665.34

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Solution

The fourth proportional to 639,642.34, 959,467.02 and 265,665.34 is: 398,499.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,642.34 : 959,467.02 = 265,665.34 : x
  2. Step 2: Convert to fraction form
    639,642.34/959,467.02 = 265,665.34/x
  3. Step 3: Cross multiply
    639,642.34x = 959,467.02 × 265,665.34
  4. Step 4: Simplify right side
    639,642.34x = 254,897,132,087.09
  5. Step 5: Solve for x
    x = 254,897,132,087.09/639,642.34
  6. Step 6: Final answer
    x = 398,499.47

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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.