Home / 442,570,511.20-663,855,766.80-212,987,999.20

Finding the Fourth Proportional to 442,570,511.20, 663,855,766.80 and 212,987,999.20

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Solution

The fourth proportional to 442,570,511.20, 663,855,766.80 and 212,987,999.20 is: 319,481,998.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    442,570,511.20 : 663,855,766.80 = 212,987,999.20 : x
  2. Step 2: Convert to fraction form
    442,570,511.20/663,855,766.80 = 212,987,999.20/x
  3. Step 3: Cross multiply
    442,570,511.20x = 663,855,766.80 × 212,987,999.20
  4. Step 4: Simplify right side
    442,570,511.20x = 141,393,311,528,113,776
  5. Step 5: Solve for x
    x = 141,393,311,528,113,776/442,570,511.20
  6. Step 6: Final answer
    x = 319,481,998.80

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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.