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Finding the Fourth Proportional to 455,342.58, 628,369.35 and 251,393.46

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Solution

The fourth proportional to 455,342.58, 628,369.35 and 251,393.46 is: 346,921.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,342.58 : 628,369.35 = 251,393.46 : x
  2. Step 2: Convert to fraction form
    455,342.58/628,369.35 = 251,393.46/x
  3. Step 3: Cross multiply
    455,342.58x = 628,369.35 × 251,393.46
  4. Step 4: Simplify right side
    455,342.58x = 157,967,945,054.45
  5. Step 5: Solve for x
    x = 157,967,945,054.45/455,342.58
  6. Step 6: Final answer
    x = 346,921.09

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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.