Home / 639,037,628.43-881,722,160.51-388,135,032.11

Finding the Fourth Proportional to 639,037,628.43, 881,722,160.51 and 388,135,032.11

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Solution

The fourth proportional to 639,037,628.43, 881,722,160.51 and 388,135,032.11 is: 535,535,379.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,037,628.43 : 881,722,160.51 = 388,135,032.11 : x
  2. Step 2: Convert to fraction form
    639,037,628.43/881,722,160.51 = 388,135,032.11/x
  3. Step 3: Cross multiply
    639,037,628.43x = 881,722,160.51 × 388,135,032.11
  4. Step 4: Simplify right side
    639,037,628.43x = 342,227,259,081,647,424
  5. Step 5: Solve for x
    x = 342,227,259,081,647,424/639,037,628.43
  6. Step 6: Final answer
    x = 535,535,379.85

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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.