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Finding the Fourth Proportional to 639,770.13, 959,333.31 and 213,154.83

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Solution

The fourth proportional to 639,770.13, 959,333.31 and 213,154.83 is: 319,625.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,770.13 : 959,333.31 = 213,154.83 : x
  2. Step 2: Convert to fraction form
    639,770.13/959,333.31 = 213,154.83/x
  3. Step 3: Cross multiply
    639,770.13x = 959,333.31 × 213,154.83
  4. Step 4: Simplify right side
    639,770.13x = 204,486,528,606.39
  5. Step 5: Solve for x
    x = 204,486,528,606.39/639,770.13
  6. Step 6: Final answer
    x = 319,625.00

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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.