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Finding the Fourth Proportional to 455,076.53, 628,018.91 and 251,140.64

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Solution

The fourth proportional to 455,076.53, 628,018.91 and 251,140.64 is: 346,581.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,076.53 : 628,018.91 = 251,140.64 : x
  2. Step 2: Convert to fraction form
    455,076.53/628,018.91 = 251,140.64/x
  3. Step 3: Cross multiply
    455,076.53x = 628,018.91 × 251,140.64
  4. Step 4: Simplify right side
    455,076.53x = 157,721,066,593.71
  5. Step 5: Solve for x
    x = 157,721,066,593.71/455,076.53
  6. Step 6: Final answer
    x = 346,581.42

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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.