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Finding the Fourth Proportional to 686,376.99, 946,879.88 and 431,868.51

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Solution

The fourth proportional to 686,376.99, 946,879.88 and 431,868.51 is: 595,776.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,376.99 : 946,879.88 = 431,868.51 : x
  2. Step 2: Convert to fraction form
    686,376.99/946,879.88 = 431,868.51/x
  3. Step 3: Cross multiply
    686,376.99x = 946,879.88 × 431,868.51
  4. Step 4: Simplify right side
    686,376.99x = 408,927,600,765.24
  5. Step 5: Solve for x
    x = 408,927,600,765.24/686,376.99
  6. Step 6: Final answer
    x = 595,776.97

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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.