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Finding the Fourth Proportional to 698,104.15, 963,278.76 and 392,121.91

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Solution

The fourth proportional to 698,104.15, 963,278.76 and 392,121.91 is: 541,069.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    698,104.15 : 963,278.76 = 392,121.91 : x
  2. Step 2: Convert to fraction form
    698,104.15/963,278.76 = 392,121.91/x
  3. Step 3: Cross multiply
    698,104.15x = 963,278.76 × 392,121.91
  4. Step 4: Simplify right side
    698,104.15x = 377,722,707,233.63
  5. Step 5: Solve for x
    x = 377,722,707,233.63/698,104.15
  6. Step 6: Final answer
    x = 541,069.28

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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.