Home / 486,415,911.21-729,317,336.89-412,665,459.81

Finding the Fourth Proportional to 486,415,911.21, 729,317,336.89 and 412,665,459.81

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Solution

The fourth proportional to 486,415,911.21, 729,317,336.89 and 412,665,459.81 is: 618,738,135.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,415,911.21 : 729,317,336.89 = 412,665,459.81 : x
  2. Step 2: Convert to fraction form
    486,415,911.21/729,317,336.89 = 412,665,459.81/x
  3. Step 3: Cross multiply
    486,415,911.21x = 729,317,336.89 × 412,665,459.81
  4. Step 4: Simplify right side
    486,415,911.21x = 300,964,074,175,116,544
  5. Step 5: Solve for x
    x = 300,964,074,175,116,544/486,415,911.21
  6. Step 6: Final answer
    x = 618,738,135.90

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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.