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Finding the Fourth Proportional to 689,240.88, 951,195.96 and 387,454.32

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Solution

The fourth proportional to 689,240.88, 951,195.96 and 387,454.32 is: 534,711.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    689,240.88 : 951,195.96 = 387,454.32 : x
  2. Step 2: Convert to fraction form
    689,240.88/951,195.96 = 387,454.32/x
  3. Step 3: Cross multiply
    689,240.88x = 951,195.96 × 387,454.32
  4. Step 4: Simplify right side
    689,240.88x = 368,544,983,868.55
  5. Step 5: Solve for x
    x = 368,544,983,868.55/689,240.88
  6. Step 6: Final answer
    x = 534,711.44

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Double scale
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Similar ratio
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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.