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Finding the Fourth Proportional to 639,215.31, 958,573.76 and 239,638.26

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Solution

The fourth proportional to 639,215.31, 958,573.76 and 239,638.26 is: 359,363.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,215.31 : 958,573.76 = 239,638.26 : x
  2. Step 2: Convert to fraction form
    639,215.31/958,573.76 = 239,638.26/x
  3. Step 3: Cross multiply
    639,215.31x = 958,573.76 × 239,638.26
  4. Step 4: Simplify right side
    639,215.31x = 229,710,946,729.87
  5. Step 5: Solve for x
    x = 229,710,946,729.87/639,215.31
  6. Step 6: Final answer
    x = 359,363.96

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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.