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Finding the Fourth Proportional to 419,009,938.80, 628,514,908.20 and 419,009,938.80

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Solution

The fourth proportional to 419,009,938.80, 628,514,908.20 and 419,009,938.80 is: 628,514,908.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    419,009,938.80 : 628,514,908.20 = 419,009,938.80 : x
  2. Step 2: Convert to fraction form
    419,009,938.80/628,514,908.20 = 419,009,938.80/x
  3. Step 3: Cross multiply
    419,009,938.80x = 628,514,908.20 × 419,009,938.80
  4. Step 4: Simplify right side
    419,009,938.80x = 263,353,993,219,769,632
  5. Step 5: Solve for x
    x = 263,353,993,219,769,632/419,009,938.80
  6. Step 6: Final answer
    x = 628,514,908.20

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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.