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Finding the Fourth Proportional to 641,654,472.70, 962,481,709.05 and 156,980,280.70

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Solution

The fourth proportional to 641,654,472.70, 962,481,709.05 and 156,980,280.70 is: 235,470,421.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,654,472.70 : 962,481,709.05 = 156,980,280.70 : x
  2. Step 2: Convert to fraction form
    641,654,472.70/962,481,709.05 = 156,980,280.70/x
  3. Step 3: Cross multiply
    641,654,472.70x = 962,481,709.05 × 156,980,280.70
  4. Step 4: Simplify right side
    641,654,472.70x = 151,090,648,855,284,704
  5. Step 5: Solve for x
    x = 151,090,648,855,284,704/641,654,472.70
  6. Step 6: Final answer
    x = 235,470,421.05

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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.