Home / 442,638,285.70-664,146,385.35-212,488,903.30

Finding the Fourth Proportional to 442,638,285.70, 664,146,385.35 and 212,488,903.30

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Solution

The fourth proportional to 442,638,285.70, 664,146,385.35 and 212,488,903.30 is: 318,824,063.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    442,638,285.70 : 664,146,385.35 = 212,488,903.30 : x
  2. Step 2: Convert to fraction form
    442,638,285.70/664,146,385.35 = 212,488,903.30/x
  3. Step 3: Cross multiply
    442,638,285.70x = 664,146,385.35 × 212,488,903.30
  4. Step 4: Simplify right side
    442,638,285.70x = 141,123,737,053,680,704
  5. Step 5: Solve for x
    x = 141,123,737,053,680,704/442,638,285.70
  6. Step 6: Final answer
    x = 318,824,063.83

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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.