Home / 716,078.91-988,161.41-393,769.79

Finding the Fourth Proportional to 716,078.91, 988,161.41 and 393,769.79

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Solution

The fourth proportional to 716,078.91, 988,161.41 and 393,769.79 is: 543,387.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,078.91 : 988,161.41 = 393,769.79 : x
  2. Step 2: Convert to fraction form
    716,078.91/988,161.41 = 393,769.79/x
  3. Step 3: Cross multiply
    716,078.91x = 988,161.41 × 393,769.79
  4. Step 4: Simplify right side
    716,078.91x = 389,108,103,992.15
  5. Step 5: Solve for x
    x = 389,108,103,992.15/716,078.91
  6. Step 6: Final answer
    x = 543,387.19

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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.