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Finding the Fourth Proportional to 356,788.70, 492,391.20 and 235,717.90

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Solution

The fourth proportional to 356,788.70, 492,391.20 and 235,717.90 is: 325,305.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    356,788.70 : 492,391.20 = 235,717.90 : x
  2. Step 2: Convert to fraction form
    356,788.70/492,391.20 = 235,717.90/x
  3. Step 3: Cross multiply
    356,788.70x = 492,391.20 × 235,717.90
  4. Step 4: Simplify right side
    356,788.70x = 116,065,419,295.44
  5. Step 5: Solve for x
    x = 116,065,419,295.44/356,788.70
  6. Step 6: Final answer
    x = 325,305.76

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.