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Finding the Fourth Proportional to 687,500.87, 948,761.30 and 381,596.87

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Solution

The fourth proportional to 687,500.87, 948,761.30 and 381,596.87 is: 526,609.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,500.87 : 948,761.30 = 381,596.87 : x
  2. Step 2: Convert to fraction form
    687,500.87/948,761.30 = 381,596.87/x
  3. Step 3: Cross multiply
    687,500.87x = 948,761.30 × 381,596.87
  4. Step 4: Simplify right side
    687,500.87x = 362,044,345,783.03
  5. Step 5: Solve for x
    x = 362,044,345,783.03/687,500.87
  6. Step 6: Final answer
    x = 526,609.29

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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.