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Finding the Fourth Proportional to 684,063.78, 944,188.80 and 393,711.06

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Solution

The fourth proportional to 684,063.78, 944,188.80 and 393,711.06 is: 543,425.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    684,063.78 : 944,188.80 = 393,711.06 : x
  2. Step 2: Convert to fraction form
    684,063.78/944,188.80 = 393,711.06/x
  3. Step 3: Cross multiply
    684,063.78x = 944,188.80 × 393,711.06
  4. Step 4: Simplify right side
    684,063.78x = 371,737,573,288.13
  5. Step 5: Solve for x
    x = 371,737,573,288.13/684,063.78
  6. Step 6: Final answer
    x = 543,425.31

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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.