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Finding the Fourth Proportional to 455,327.91, 628,373.54 and 251,407.78

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Solution

The fourth proportional to 455,327.91, 628,373.54 and 251,407.78 is: 346,954.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,327.91 : 628,373.54 = 251,407.78 : x
  2. Step 2: Convert to fraction form
    455,327.91/628,373.54 = 251,407.78/x
  3. Step 3: Cross multiply
    455,327.91x = 628,373.54 × 251,407.78
  4. Step 4: Simplify right side
    455,327.91x = 157,977,995,759.73
  5. Step 5: Solve for x
    x = 157,977,995,759.73/455,327.91
  6. Step 6: Final answer
    x = 346,954.34

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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.