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Finding the Fourth Proportional to 690,965.66, 953,609.81 and 385,069.97

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Solution

The fourth proportional to 690,965.66, 953,609.81 and 385,069.97 is: 531,439.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    690,965.66 : 953,609.81 = 385,069.97 : x
  2. Step 2: Convert to fraction form
    690,965.66/953,609.81 = 385,069.97/x
  3. Step 3: Cross multiply
    690,965.66x = 953,609.81 × 385,069.97
  4. Step 4: Simplify right side
    690,965.66x = 367,206,500,928.41
  5. Step 5: Solve for x
    x = 367,206,500,928.41/690,965.66
  6. Step 6: Final answer
    x = 531,439.58

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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.