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Finding the Fourth Proportional to 455,209.69, 628,189.43 and 251,260.66

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Solution

The fourth proportional to 455,209.69, 628,189.43 and 251,260.66 is: 346,739.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,209.69 : 628,189.43 = 251,260.66 : x
  2. Step 2: Convert to fraction form
    455,209.69/628,189.43 = 251,260.66/x
  3. Step 3: Cross multiply
    455,209.69x = 628,189.43 × 251,260.66
  4. Step 4: Simplify right side
    455,209.69x = 157,839,291,100.99
  5. Step 5: Solve for x
    x = 157,839,291,100.99/455,209.69
  6. Step 6: Final answer
    x = 346,739.74

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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.