Home / 412,128,001.20-618,192,001.80-291,195,649.20

Finding the Fourth Proportional to 412,128,001.20, 618,192,001.80 and 291,195,649.20

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Solution

The fourth proportional to 412,128,001.20, 618,192,001.80 and 291,195,649.20 is: 436,793,473.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    412,128,001.20 : 618,192,001.80 = 291,195,649.20 : x
  2. Step 2: Convert to fraction form
    412,128,001.20/618,192,001.80 = 291,195,649.20/x
  3. Step 3: Cross multiply
    412,128,001.20x = 618,192,001.80 × 291,195,649.20
  4. Step 4: Simplify right side
    412,128,001.20x = 180,014,821,294,398,560
  5. Step 5: Solve for x
    x = 180,014,821,294,398,560/412,128,001.20
  6. Step 6: Final answer
    x = 436,793,473.80

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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.