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Finding the Fourth Proportional to 392,920.80, 588,603.60 and 234,679.20

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Solution

The fourth proportional to 392,920.80, 588,603.60 and 234,679.20 is: 351,554.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,920.80 : 588,603.60 = 234,679.20 : x
  2. Step 2: Convert to fraction form
    392,920.80/588,603.60 = 234,679.20/x
  3. Step 3: Cross multiply
    392,920.80x = 588,603.60 × 234,679.20
  4. Step 4: Simplify right side
    392,920.80x = 138,133,021,965.12
  5. Step 5: Solve for x
    x = 138,133,021,965.12/392,920.80
  6. Step 6: Final answer
    x = 351,554.36

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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.