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Finding the Fourth Proportional to 455,346.78, 628,362.26 and 251,393.54

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Solution

The fourth proportional to 455,346.78, 628,362.26 and 251,393.54 is: 346,914.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,346.78 : 628,362.26 = 251,393.54 : x
  2. Step 2: Convert to fraction form
    455,346.78/628,362.26 = 251,393.54/x
  3. Step 3: Cross multiply
    455,346.78x = 628,362.26 × 251,393.54
  4. Step 4: Simplify right side
    455,346.78x = 157,966,212,943.80
  5. Step 5: Solve for x
    x = 157,966,212,943.80/455,346.78
  6. Step 6: Final answer
    x = 346,914.09

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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.