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Finding the Fourth Proportional to 677,382.92, 934,780.71 and 390,896.85

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Solution

The fourth proportional to 677,382.92, 934,780.71 and 390,896.85 is: 539,433.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    677,382.92 : 934,780.71 = 390,896.85 : x
  2. Step 2: Convert to fraction form
    677,382.92/934,780.71 = 390,896.85/x
  3. Step 3: Cross multiply
    677,382.92x = 934,780.71 × 390,896.85
  4. Step 4: Simplify right side
    677,382.92x = 365,402,839,951.05
  5. Step 5: Solve for x
    x = 365,402,839,951.05/677,382.92
  6. Step 6: Final answer
    x = 539,433.21

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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.