Home / 718,196,380.57-991,110,557.52-388,171,519.57

Finding the Fourth Proportional to 718,196,380.57, 991,110,557.52 and 388,171,519.57

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Solution

The fourth proportional to 718,196,380.57, 991,110,557.52 and 388,171,519.57 is: 535,676,455.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,196,380.57 : 991,110,557.52 = 388,171,519.57 : x
  2. Step 2: Convert to fraction form
    718,196,380.57/991,110,557.52 = 388,171,519.57/x
  3. Step 3: Cross multiply
    718,196,380.57x = 991,110,557.52 × 388,171,519.57
  4. Step 4: Simplify right side
    718,196,380.57x = 384,720,891,174,408,256
  5. Step 5: Solve for x
    x = 384,720,891,174,408,256/718,196,380.57
  6. Step 6: Final answer
    x = 535,676,455.05

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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.