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Finding the Fourth Proportional to 678,784.77, 936,512.28 and 392,200.29

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Solution

The fourth proportional to 678,784.77, 936,512.28 and 392,200.29 is: 541,114.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,784.77 : 936,512.28 = 392,200.29 : x
  2. Step 2: Convert to fraction form
    678,784.77/936,512.28 = 392,200.29/x
  3. Step 3: Cross multiply
    678,784.77x = 936,512.28 × 392,200.29
  4. Step 4: Simplify right side
    678,784.77x = 367,300,387,804.56
  5. Step 5: Solve for x
    x = 367,300,387,804.56/678,784.77
  6. Step 6: Final answer
    x = 541,114.66

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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.