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Finding the Fourth Proportional to 618,961.87, 854,319.30 and 377,377.64

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Solution

The fourth proportional to 618,961.87, 854,319.30 and 377,377.64 is: 520,873.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    618,961.87 : 854,319.30 = 377,377.64 : x
  2. Step 2: Convert to fraction form
    618,961.87/854,319.30 = 377,377.64/x
  3. Step 3: Cross multiply
    618,961.87x = 854,319.30 × 377,377.64
  4. Step 4: Simplify right side
    618,961.87x = 322,400,996,968.86
  5. Step 5: Solve for x
    x = 322,400,996,968.86/618,961.87
  6. Step 6: Final answer
    x = 520,873.76

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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.