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Finding the Fourth Proportional to 639,443.73, 958,957.93 and 212,864.97

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Solution

The fourth proportional to 639,443.73, 958,957.93 and 212,864.97 is: 319,228.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,443.73 : 958,957.93 = 212,864.97 : x
  2. Step 2: Convert to fraction form
    639,443.73/958,957.93 = 212,864.97/x
  3. Step 3: Cross multiply
    639,443.73x = 958,957.93 × 212,864.97
  4. Step 4: Simplify right side
    639,443.73x = 204,128,551,000.71
  5. Step 5: Solve for x
    x = 204,128,551,000.71/639,443.73
  6. Step 6: Final answer
    x = 319,228.33

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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.