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Finding the Fourth Proportional to 455,238.81, 628,229.67 and 251,289.85

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Solution

The fourth proportional to 455,238.81, 628,229.67 and 251,289.85 is: 346,780.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,238.81 : 628,229.67 = 251,289.85 : x
  2. Step 2: Convert to fraction form
    455,238.81/628,229.67 = 251,289.85/x
  3. Step 3: Cross multiply
    455,238.81x = 628,229.67 × 251,289.85
  4. Step 4: Simplify right side
    455,238.81x = 157,867,736,398.70
  5. Step 5: Solve for x
    x = 157,867,736,398.70/455,238.81
  6. Step 6: Final answer
    x = 346,780.05

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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.