Home / 407,228,346-561,970,393.56-221,586,163.20

Finding the Fourth Proportional to 407,228,346, 561,970,393.56 and 221,586,163.20

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Solution

The fourth proportional to 407,228,346, 561,970,393.56 and 221,586,163.20 is: 305,786,334.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    407,228,346 : 561,970,393.56 = 221,586,163.20 : x
  2. Step 2: Convert to fraction form
    407,228,346/561,970,393.56 = 221,586,163.20/x
  3. Step 3: Cross multiply
    407,228,346x = 561,970,393.56 × 221,586,163.20
  4. Step 4: Simplify right side
    407,228,346x = 124,524,863,340,954,368
  5. Step 5: Solve for x
    x = 124,524,863,340,954,368/407,228,346
  6. Step 6: Final answer
    x = 305,786,334.78

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.