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Finding the Fourth Proportional to 455,072.64, 628,007.04 and 251,120.40

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Solution

The fourth proportional to 455,072.64, 628,007.04 and 251,120.40 is: 346,549.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,072.64 : 628,007.04 = 251,120.40 : x
  2. Step 2: Convert to fraction form
    455,072.64/628,007.04 = 251,120.40/x
  3. Step 3: Cross multiply
    455,072.64x = 628,007.04 × 251,120.40
  4. Step 4: Simplify right side
    455,072.64x = 157,705,379,087.62
  5. Step 5: Solve for x
    x = 157,705,379,087.62/455,072.64
  6. Step 6: Final answer
    x = 346,549.90

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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.