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Finding the Fourth Proportional to 500,866.65, 691,061.40 and 285,963.93

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Solution

The fourth proportional to 500,866.65, 691,061.40 and 285,963.93 is: 394,553.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    500,866.65 : 691,061.40 = 285,963.93 : x
  2. Step 2: Convert to fraction form
    500,866.65/691,061.40 = 285,963.93/x
  3. Step 3: Cross multiply
    500,866.65x = 691,061.40 × 285,963.93
  4. Step 4: Simplify right side
    500,866.65x = 197,618,633,815.30
  5. Step 5: Solve for x
    x = 197,618,633,815.30/500,866.65
  6. Step 6: Final answer
    x = 394,553.39

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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.