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Finding the Fourth Proportional to 455,456.90, 628,514.43 and 251,504.30

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Solution

The fourth proportional to 455,456.90, 628,514.43 and 251,504.30 is: 347,067.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,456.90 : 628,514.43 = 251,504.30 : x
  2. Step 2: Convert to fraction form
    455,456.90/628,514.43 = 251,504.30/x
  3. Step 3: Cross multiply
    455,456.90x = 628,514.43 × 251,504.30
  4. Step 4: Simplify right side
    455,456.90x = 158,074,081,757.05
  5. Step 5: Solve for x
    x = 158,074,081,757.05/455,456.90
  6. Step 6: Final answer
    x = 347,067.05

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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.