Home / 621,556.45-857,741.68-345,909.69

Finding the Fourth Proportional to 621,556.45, 857,741.68 and 345,909.69

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Solution

The fourth proportional to 621,556.45, 857,741.68 and 345,909.69 is: 477,351.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,556.45 : 857,741.68 = 345,909.69 : x
  2. Step 2: Convert to fraction form
    621,556.45/857,741.68 = 345,909.69/x
  3. Step 3: Cross multiply
    621,556.45x = 857,741.68 × 345,909.69
  4. Step 4: Simplify right side
    621,556.45x = 296,701,158,628.88
  5. Step 5: Solve for x
    x = 296,701,158,628.88/621,556.45
  6. Step 6: Final answer
    x = 477,351.91

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1.5x scale

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.