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Finding the Fourth Proportional to 455,679.60, 629,671.32 and 395,055.60

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Solution

The fourth proportional to 455,679.60, 629,671.32 and 395,055.60 is: 545,899.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,679.60 : 629,671.32 = 395,055.60 : x
  2. Step 2: Convert to fraction form
    455,679.60/629,671.32 = 395,055.60/x
  3. Step 3: Cross multiply
    455,679.60x = 629,671.32 × 395,055.60
  4. Step 4: Simplify right side
    455,679.60x = 248,755,181,125.39
  5. Step 5: Solve for x
    x = 248,755,181,125.39/455,679.60
  6. Step 6: Final answer
    x = 545,899.31

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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.