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Finding the Fourth Proportional to 303,978.70, 455,276.85 and 192,004.30

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Solution

The fourth proportional to 303,978.70, 455,276.85 and 192,004.30 is: 287,569.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,978.70 : 455,276.85 = 192,004.30 : x
  2. Step 2: Convert to fraction form
    303,978.70/455,276.85 = 192,004.30/x
  3. Step 3: Cross multiply
    303,978.70x = 455,276.85 × 192,004.30
  4. Step 4: Simplify right side
    303,978.70x = 87,415,112,890.46
  5. Step 5: Solve for x
    x = 87,415,112,890.46/303,978.70
  6. Step 6: Final answer
    x = 287,569.86

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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.