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Finding the Fourth Proportional to 658,257, 987,388.74 and 159,621

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Solution

The fourth proportional to 658,257, 987,388.74 and 159,621 is: 239,432.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    658,257 : 987,388.74 = 159,621 : x
  2. Step 2: Convert to fraction form
    658,257/987,388.74 = 159,621/x
  3. Step 3: Cross multiply
    658,257x = 987,388.74 × 159,621
  4. Step 4: Simplify right side
    658,257x = 157,607,978,067.54
  5. Step 5: Solve for x
    x = 157,607,978,067.54/658,257
  6. Step 6: Final answer
    x = 239,432.29

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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.