Home / 659,022.20-987,221.10-378,211.40

Finding the Fourth Proportional to 659,022.20, 987,221.10 and 378,211.40

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Solution

The fourth proportional to 659,022.20, 987,221.10 and 378,211.40 is: 566,564.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,022.20 : 987,221.10 = 378,211.40 : x
  2. Step 2: Convert to fraction form
    659,022.20/987,221.10 = 378,211.40/x
  3. Step 3: Cross multiply
    659,022.20x = 987,221.10 × 378,211.40
  4. Step 4: Simplify right side
    659,022.20x = 373,378,274,340.54
  5. Step 5: Solve for x
    x = 373,378,274,340.54/659,022.20
  6. Step 6: Final answer
    x = 566,564.03

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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.