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Finding the Fourth Proportional to 690,713.89, 953,170.80 and 384,789.85

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Solution

The fourth proportional to 690,713.89, 953,170.80 and 384,789.85 is: 531,001.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    690,713.89 : 953,170.80 = 384,789.85 : x
  2. Step 2: Convert to fraction form
    690,713.89/953,170.80 = 384,789.85/x
  3. Step 3: Cross multiply
    690,713.89x = 953,170.80 × 384,789.85
  4. Step 4: Simplify right side
    690,713.89x = 366,770,444,390.53
  5. Step 5: Solve for x
    x = 366,770,444,390.53/690,713.89
  6. Step 6: Final answer
    x = 531,001.99

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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.