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Finding the Fourth Proportional to 455,640.39, 628,757.72 and 272,086.11

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Solution

The fourth proportional to 455,640.39, 628,757.72 and 272,086.11 is: 375,463.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,640.39 : 628,757.72 = 272,086.11 : x
  2. Step 2: Convert to fraction form
    455,640.39/628,757.72 = 272,086.11/x
  3. Step 3: Cross multiply
    455,640.39x = 628,757.72 × 272,086.11
  4. Step 4: Simplify right side
    455,640.39x = 171,076,242,830.30
  5. Step 5: Solve for x
    x = 171,076,242,830.30/455,640.39
  6. Step 6: Final answer
    x = 375,463.30

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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.