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Finding the Fourth Proportional to 289,634.51, 399,553.59 and 251,340.31

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Solution

The fourth proportional to 289,634.51, 399,553.59 and 251,340.31 is: 346,726.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,634.51 : 399,553.59 = 251,340.31 : x
  2. Step 2: Convert to fraction form
    289,634.51/399,553.59 = 251,340.31/x
  3. Step 3: Cross multiply
    289,634.51x = 399,553.59 × 251,340.31
  4. Step 4: Simplify right side
    289,634.51x = 100,423,923,172.21
  5. Step 5: Solve for x
    x = 100,423,923,172.21/289,634.51
  6. Step 6: Final answer
    x = 346,726.37

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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.