Home / 442,870,902.70-664,495,310.85-212,721,520.30

Finding the Fourth Proportional to 442,870,902.70, 664,495,310.85 and 212,721,520.30

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Solution

The fourth proportional to 442,870,902.70, 664,495,310.85 and 212,721,520.30 is: 319,173,040.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    442,870,902.70 : 664,495,310.85 = 212,721,520.30 : x
  2. Step 2: Convert to fraction form
    442,870,902.70/664,495,310.85 = 212,721,520.30/x
  3. Step 3: Cross multiply
    442,870,902.70x = 664,495,310.85 × 212,721,520.30
  4. Step 4: Simplify right side
    442,870,902.70x = 141,352,452,756,233,104
  5. Step 5: Solve for x
    x = 141,352,452,756,233,104/442,870,902.70
  6. Step 6: Final answer
    x = 319,173,040.93

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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.