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Finding the Fourth Proportional to 978,571.78, 1,467,958.44 and 338,874.28

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Solution

The fourth proportional to 978,571.78, 1,467,958.44 and 338,874.28 is: 508,346.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,571.78 : 1,467,958.44 = 338,874.28 : x
  2. Step 2: Convert to fraction form
    978,571.78/1,467,958.44 = 338,874.28/x
  3. Step 3: Cross multiply
    978,571.78x = 1,467,958.44 × 338,874.28
  4. Step 4: Simplify right side
    978,571.78x = 497,453,359,424.92
  5. Step 5: Solve for x
    x = 497,453,359,424.92/978,571.78
  6. Step 6: Final answer
    x = 508,346.32

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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.