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Finding the Fourth Proportional to 641,654,018.60, 962,481,027.90 and 156,979,826.60

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Solution

The fourth proportional to 641,654,018.60, 962,481,027.90 and 156,979,826.60 is: 235,469,739.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,654,018.60 : 962,481,027.90 = 156,979,826.60 : x
  2. Step 2: Convert to fraction form
    641,654,018.60/962,481,027.90 = 156,979,826.60/x
  3. Step 3: Cross multiply
    641,654,018.60x = 962,481,027.90 × 156,979,826.60
  4. Step 4: Simplify right side
    641,654,018.60x = 151,090,104,865,531,744
  5. Step 5: Solve for x
    x = 151,090,104,865,531,744/641,654,018.60
  6. Step 6: Final answer
    x = 235,469,739.90

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Double scale
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Similar ratio
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1.5x scale

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.