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Finding the Fourth Proportional to 639,908.25, 960,020.25 and 190,627.37

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Solution

The fourth proportional to 639,908.25, 960,020.25 and 190,627.37 is: 285,988.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,908.25 : 960,020.25 = 190,627.37 : x
  2. Step 2: Convert to fraction form
    639,908.25/960,020.25 = 190,627.37/x
  3. Step 3: Cross multiply
    639,908.25x = 960,020.25 × 190,627.37
  4. Step 4: Simplify right side
    639,908.25x = 183,006,137,804.29
  5. Step 5: Solve for x
    x = 183,006,137,804.29/639,908.25
  6. Step 6: Final answer
    x = 285,988.09

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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.