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Finding the Fourth Proportional to 392,982.16, 588,979.80 and 168,078

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Solution

The fourth proportional to 392,982.16, 588,979.80 and 168,078 is: 251,905.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,982.16 : 588,979.80 = 168,078 : x
  2. Step 2: Convert to fraction form
    392,982.16/588,979.80 = 168,078/x
  3. Step 3: Cross multiply
    392,982.16x = 588,979.80 × 168,078
  4. Step 4: Simplify right side
    392,982.16x = 98,994,546,824.40
  5. Step 5: Solve for x
    x = 98,994,546,824.40/392,982.16
  6. Step 6: Final answer
    x = 251,905.96

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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.