Home / 716,318.78-988,514.38-394,021.80

Finding the Fourth Proportional to 716,318.78, 988,514.38 and 394,021.80

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Solution

The fourth proportional to 716,318.78, 988,514.38 and 394,021.80 is: 543,747.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,318.78 : 988,514.38 = 394,021.80 : x
  2. Step 2: Convert to fraction form
    716,318.78/988,514.38 = 394,021.80/x
  3. Step 3: Cross multiply
    716,318.78x = 988,514.38 × 394,021.80
  4. Step 4: Simplify right side
    716,318.78x = 389,496,215,826.01
  5. Step 5: Solve for x
    x = 389,496,215,826.01/716,318.78
  6. Step 6: Final answer
    x = 543,747.04

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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.