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Finding the Fourth Proportional to 714,891.10, 986,546.14 and 388,201.20

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Solution

The fourth proportional to 714,891.10, 986,546.14 and 388,201.20 is: 535,715.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    714,891.10 : 986,546.14 = 388,201.20 : x
  2. Step 2: Convert to fraction form
    714,891.10/986,546.14 = 388,201.20/x
  3. Step 3: Cross multiply
    714,891.10x = 986,546.14 × 388,201.20
  4. Step 4: Simplify right side
    714,891.10x = 382,978,394,432.87
  5. Step 5: Solve for x
    x = 382,978,394,432.87/714,891.10
  6. Step 6: Final answer
    x = 535,715.71

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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.