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Finding the Fourth Proportional to 391,846.62, 540,247.74 and 253,781.61

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Solution

The fourth proportional to 391,846.62, 540,247.74 and 253,781.61 is: 349,894.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,846.62 : 540,247.74 = 253,781.61 : x
  2. Step 2: Convert to fraction form
    391,846.62/540,247.74 = 253,781.61/x
  3. Step 3: Cross multiply
    391,846.62x = 540,247.74 × 253,781.61
  4. Step 4: Simplify right side
    391,846.62x = 137,104,938,554.82
  5. Step 5: Solve for x
    x = 137,104,938,554.82/391,846.62
  6. Step 6: Final answer
    x = 349,894.41

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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.