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Finding the Fourth Proportional to 715,666.96, 987,600.36 and 393,377.68

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Solution

The fourth proportional to 715,666.96, 987,600.36 and 393,377.68 is: 542,850.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,666.96 : 987,600.36 = 393,377.68 : x
  2. Step 2: Convert to fraction form
    715,666.96/987,600.36 = 393,377.68/x
  3. Step 3: Cross multiply
    715,666.96x = 987,600.36 × 393,377.68
  4. Step 4: Simplify right side
    715,666.96x = 388,499,938,383.97
  5. Step 5: Solve for x
    x = 388,499,938,383.97/715,666.96
  6. Step 6: Final answer
    x = 542,850.18

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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.