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Finding the Fourth Proportional to 455,295.89, 628,309.25 and 251,347.09

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Solution

The fourth proportional to 455,295.89, 628,309.25 and 251,347.09 is: 346,859.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,295.89 : 628,309.25 = 251,347.09 : x
  2. Step 2: Convert to fraction form
    455,295.89/628,309.25 = 251,347.09/x
  3. Step 3: Cross multiply
    455,295.89x = 628,309.25 × 251,347.09
  4. Step 4: Simplify right side
    455,295.89x = 157,923,701,430.97
  5. Step 5: Solve for x
    x = 157,923,701,430.97/455,295.89
  6. Step 6: Final answer
    x = 346,859.50

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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.