Home / 486,415,913.21-729,317,339.89-412,665,461.81

Finding the Fourth Proportional to 486,415,913.21, 729,317,339.89 and 412,665,461.81

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Solution

The fourth proportional to 486,415,913.21, 729,317,339.89 and 412,665,461.81 is: 618,738,138.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,415,913.21 : 729,317,339.89 = 412,665,461.81 : x
  2. Step 2: Convert to fraction form
    486,415,913.21/729,317,339.89 = 412,665,461.81/x
  3. Step 3: Cross multiply
    486,415,913.21x = 729,317,339.89 × 412,665,461.81
  4. Step 4: Simplify right side
    486,415,913.21x = 300,964,076,867,069,376
  5. Step 5: Solve for x
    x = 300,964,076,867,069,376/486,415,913.21
  6. Step 6: Final answer
    x = 618,738,138.90

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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.