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Finding the Fourth Proportional to 639,611.84, 958,367.98 and 218,658.08

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Solution

The fourth proportional to 639,611.84, 958,367.98 and 218,658.08 is: 327,628.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,611.84 : 958,367.98 = 218,658.08 : x
  2. Step 2: Convert to fraction form
    639,611.84/958,367.98 = 218,658.08/x
  3. Step 3: Cross multiply
    639,611.84x = 958,367.98 × 218,658.08
  4. Step 4: Simplify right side
    639,611.84x = 209,554,902,440.28
  5. Step 5: Solve for x
    x = 209,554,902,440.28/639,611.84
  6. Step 6: Final answer
    x = 327,628.24

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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.