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Finding the Fourth Proportional to 391,846.37, 540,247.40 and 253,781.36

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Solution

The fourth proportional to 391,846.37, 540,247.40 and 253,781.36 is: 349,894.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,846.37 : 540,247.40 = 253,781.36 : x
  2. Step 2: Convert to fraction form
    391,846.37/540,247.40 = 253,781.36/x
  3. Step 3: Cross multiply
    391,846.37x = 540,247.40 × 253,781.36
  4. Step 4: Simplify right side
    391,846.37x = 137,104,715,938.32
  5. Step 5: Solve for x
    x = 137,104,715,938.32/391,846.37
  6. Step 6: Final answer
    x = 349,894.06

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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.