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Finding the Fourth Proportional to 437,608.80, 656,332.20 and 122,000.40

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Solution

The fourth proportional to 437,608.80, 656,332.20 and 122,000.40 is: 182,978.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    437,608.80 : 656,332.20 = 122,000.40 : x
  2. Step 2: Convert to fraction form
    437,608.80/656,332.20 = 122,000.40/x
  3. Step 3: Cross multiply
    437,608.80x = 656,332.20 × 122,000.40
  4. Step 4: Simplify right side
    437,608.80x = 80,072,790,932.88
  5. Step 5: Solve for x
    x = 80,072,790,932.88/437,608.80
  6. Step 6: Final answer
    x = 182,978.02

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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.