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Finding the Fourth Proportional to 517,895.40, 775,530.90 and 412,919.40

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Solution

The fourth proportional to 517,895.40, 775,530.90 and 412,919.40 is: 618,332.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    517,895.40 : 775,530.90 = 412,919.40 : x
  2. Step 2: Convert to fraction form
    517,895.40/775,530.90 = 412,919.40/x
  3. Step 3: Cross multiply
    517,895.40x = 775,530.90 × 412,919.40
  4. Step 4: Simplify right side
    517,895.40x = 320,231,753,909.46
  5. Step 5: Solve for x
    x = 320,231,753,909.46/517,895.40
  6. Step 6: Final answer
    x = 618,332.88

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.