Home / 685,213.12-945,619.84-383,409.28

Finding the Fourth Proportional to 685,213.12, 945,619.84 and 383,409.28

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Solution

The fourth proportional to 685,213.12, 945,619.84 and 383,409.28 is: 529,119.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,213.12 : 945,619.84 = 383,409.28 : x
  2. Step 2: Convert to fraction form
    685,213.12/945,619.84 = 383,409.28/x
  3. Step 3: Cross multiply
    685,213.12x = 945,619.84 × 383,409.28
  4. Step 4: Simplify right side
    685,213.12x = 362,559,422,008.12
  5. Step 5: Solve for x
    x = 362,559,422,008.12/685,213.12
  6. Step 6: Final answer
    x = 529,119.21

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Double scale
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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.