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Finding the Fourth Proportional to 455,404, 628,449.74 and 251,449.84

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Solution

The fourth proportional to 455,404, 628,449.74 and 251,449.84 is: 346,996.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,404 : 628,449.74 = 251,449.84 : x
  2. Step 2: Convert to fraction form
    455,404/628,449.74 = 251,449.84/x
  3. Step 3: Cross multiply
    455,404x = 628,449.74 × 251,449.84
  4. Step 4: Simplify right side
    455,404x = 158,023,586,571.04
  5. Step 5: Solve for x
    x = 158,023,586,571.04/455,404
  6. Step 6: Final answer
    x = 346,996.48

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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.