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Finding the Fourth Proportional to 678,853.42, 936,986.07 and 392,332.12

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Solution

The fourth proportional to 678,853.42, 936,986.07 and 392,332.12 is: 541,515.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,853.42 : 936,986.07 = 392,332.12 : x
  2. Step 2: Convert to fraction form
    678,853.42/936,986.07 = 392,332.12/x
  3. Step 3: Cross multiply
    678,853.42x = 936,986.07 × 392,332.12
  4. Step 4: Simplify right side
    678,853.42x = 367,609,731,253.57
  5. Step 5: Solve for x
    x = 367,609,731,253.57/678,853.42
  6. Step 6: Final answer
    x = 541,515.62

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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.