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Finding the Fourth Proportional to 393,388.64, 590,083.32 and 168,603.20

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Solution

The fourth proportional to 393,388.64, 590,083.32 and 168,603.20 is: 252,904.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,388.64 : 590,083.32 = 168,603.20 : x
  2. Step 2: Convert to fraction form
    393,388.64/590,083.32 = 168,603.20/x
  3. Step 3: Cross multiply
    393,388.64x = 590,083.32 × 168,603.20
  4. Step 4: Simplify right side
    393,388.64x = 99,489,936,018.62
  5. Step 5: Solve for x
    x = 99,489,936,018.62/393,388.64
  6. Step 6: Final answer
    x = 252,904.95

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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.