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Finding the Fourth Proportional to 455,070.25, 627,996.45 and 251,121.12

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Solution

The fourth proportional to 455,070.25, 627,996.45 and 251,121.12 is: 346,546.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,070.25 : 627,996.45 = 251,121.12 : x
  2. Step 2: Convert to fraction form
    455,070.25/627,996.45 = 251,121.12/x
  3. Step 3: Cross multiply
    455,070.25x = 627,996.45 × 251,121.12
  4. Step 4: Simplify right side
    455,070.25x = 157,703,171,880.02
  5. Step 5: Solve for x
    x = 157,703,171,880.02/455,070.25
  6. Step 6: Final answer
    x = 346,546.87

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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.