Home / 491,918.69-678,849.19-285,227.15

Finding the Fourth Proportional to 491,918.69, 678,849.19 and 285,227.15

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Solution

The fourth proportional to 491,918.69, 678,849.19 and 285,227.15 is: 393,614.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    491,918.69 : 678,849.19 = 285,227.15 : x
  2. Step 2: Convert to fraction form
    491,918.69/678,849.19 = 285,227.15/x
  3. Step 3: Cross multiply
    491,918.69x = 678,849.19 × 285,227.15
  4. Step 4: Simplify right side
    491,918.69x = 193,626,215,636.20
  5. Step 5: Solve for x
    x = 193,626,215,636.20/491,918.69
  6. Step 6: Final answer
    x = 393,614.27

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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.