Home / 406,959,756.30-610,439,634.45-212,930,647.20

Finding the Fourth Proportional to 406,959,756.30, 610,439,634.45 and 212,930,647.20

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Solution

The fourth proportional to 406,959,756.30, 610,439,634.45 and 212,930,647.20 is: 319,395,970.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    406,959,756.30 : 610,439,634.45 = 212,930,647.20 : x
  2. Step 2: Convert to fraction form
    406,959,756.30/610,439,634.45 = 212,930,647.20/x
  3. Step 3: Cross multiply
    406,959,756.30x = 610,439,634.45 × 212,930,647.20
  4. Step 4: Simplify right side
    406,959,756.30x = 129,981,306,439,969,920
  5. Step 5: Solve for x
    x = 129,981,306,439,969,920/406,959,756.30
  6. Step 6: Final answer
    x = 319,395,970.80

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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.