Home / 815,719,142.52-1,223,577,606.11-378,780,900.03

Finding the Fourth Proportional to 815,719,142.52, 1,223,577,606.11 and 378,780,900.03

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Solution

The fourth proportional to 815,719,142.52, 1,223,577,606.11 and 378,780,900.03 is: 568,170,835.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    815,719,142.52 : 1,223,577,606.11 = 378,780,900.03 : x
  2. Step 2: Convert to fraction form
    815,719,142.52/1,223,577,606.11 = 378,780,900.03/x
  3. Step 3: Cross multiply
    815,719,142.52x = 1,223,577,606.11 × 378,780,900.03
  4. Step 4: Simplify right side
    815,719,142.52x = 463,467,826,897,004,672
  5. Step 5: Solve for x
    x = 463,467,826,897,004,672/815,719,142.52
  6. Step 6: Final answer
    x = 568,170,835.69

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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.