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Finding the Fourth Proportional to 390,620.93, 585,325.34 and 270,911.39

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Solution

The fourth proportional to 390,620.93, 585,325.34 and 270,911.39 is: 405,946.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,620.93 : 585,325.34 = 270,911.39 : x
  2. Step 2: Convert to fraction form
    390,620.93/585,325.34 = 270,911.39/x
  3. Step 3: Cross multiply
    390,620.93x = 585,325.34 × 270,911.39
  4. Step 4: Simplify right side
    390,620.93x = 158,571,297,180.44
  5. Step 5: Solve for x
    x = 158,571,297,180.44/390,620.93
  6. Step 6: Final answer
    x = 405,946.75

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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.