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Finding the Fourth Proportional to 714,344.46, 985,855.86 and 392,109.15

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Solution

The fourth proportional to 714,344.46, 985,855.86 and 392,109.15 is: 541,143.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    714,344.46 : 985,855.86 = 392,109.15 : x
  2. Step 2: Convert to fraction form
    714,344.46/985,855.86 = 392,109.15/x
  3. Step 3: Cross multiply
    714,344.46x = 985,855.86 × 392,109.15
  4. Step 4: Simplify right side
    714,344.46x = 386,563,103,287.12
  5. Step 5: Solve for x
    x = 386,563,103,287.12/714,344.46
  6. Step 6: Final answer
    x = 541,143.84

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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.