Home / 442,638,290.20-664,146,392.10-212,488,907.80

Finding the Fourth Proportional to 442,638,290.20, 664,146,392.10 and 212,488,907.80

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Solution

The fourth proportional to 442,638,290.20, 664,146,392.10 and 212,488,907.80 is: 318,824,070.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    442,638,290.20 : 664,146,392.10 = 212,488,907.80 : x
  2. Step 2: Convert to fraction form
    442,638,290.20/664,146,392.10 = 212,488,907.80/x
  3. Step 3: Cross multiply
    442,638,290.20x = 664,146,392.10 × 212,488,907.80
  4. Step 4: Simplify right side
    442,638,290.20x = 141,123,741,476,639,568
  5. Step 5: Solve for x
    x = 141,123,741,476,639,568/442,638,290.20
  6. Step 6: Final answer
    x = 318,824,070.58

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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.