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Finding the Fourth Proportional to 455,345.78, 628,360.88 and 251,392.54

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Solution

The fourth proportional to 455,345.78, 628,360.88 and 251,392.54 is: 346,912.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,345.78 : 628,360.88 = 251,392.54 : x
  2. Step 2: Convert to fraction form
    455,345.78/628,360.88 = 251,392.54/x
  3. Step 3: Cross multiply
    455,345.78x = 628,360.88 × 251,392.54
  4. Step 4: Simplify right side
    455,345.78x = 157,965,237,659.84
  5. Step 5: Solve for x
    x = 157,965,237,659.84/455,345.78
  6. Step 6: Final answer
    x = 346,912.71

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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.