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Finding the Fourth Proportional to 678,772.53, 936,651.47 and 392,311.17

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Solution

The fourth proportional to 678,772.53, 936,651.47 and 392,311.17 is: 541,357.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,772.53 : 936,651.47 = 392,311.17 : x
  2. Step 2: Convert to fraction form
    678,772.53/936,651.47 = 392,311.17/x
  3. Step 3: Cross multiply
    678,772.53x = 936,651.47 × 392,311.17
  4. Step 4: Simplify right side
    678,772.53x = 367,458,832,116.36
  5. Step 5: Solve for x
    x = 367,458,832,116.36/678,772.53
  6. Step 6: Final answer
    x = 541,357.84

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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.