Home / 641,976.75-885,775.77-380,199.84

Finding the Fourth Proportional to 641,976.75, 885,775.77 and 380,199.84

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Solution

The fourth proportional to 641,976.75, 885,775.77 and 380,199.84 is: 524,585.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,976.75 : 885,775.77 = 380,199.84 : x
  2. Step 2: Convert to fraction form
    641,976.75/885,775.77 = 380,199.84/x
  3. Step 3: Cross multiply
    641,976.75x = 885,775.77 × 380,199.84
  4. Step 4: Simplify right side
    641,976.75x = 336,771,806,029.88
  5. Step 5: Solve for x
    x = 336,771,806,029.88/641,976.75
  6. Step 6: Final answer
    x = 524,585.67

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Double scale
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Similar ratio
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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.