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Finding the Fourth Proportional to 455,622.71, 628,756.83 and 251,687.66

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Solution

The fourth proportional to 455,622.71, 628,756.83 and 251,687.66 is: 347,327.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,622.71 : 628,756.83 = 251,687.66 : x
  2. Step 2: Convert to fraction form
    455,622.71/628,756.83 = 251,687.66/x
  3. Step 3: Cross multiply
    455,622.71x = 628,756.83 × 251,687.66
  4. Step 4: Simplify right side
    455,622.71x = 158,250,332,107.93
  5. Step 5: Solve for x
    x = 158,250,332,107.93/455,622.71
  6. Step 6: Final answer
    x = 347,327.58

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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.