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Finding the Fourth Proportional to 455,228.70, 628,215.63 and 251,279.69

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Solution

The fourth proportional to 455,228.70, 628,215.63 and 251,279.69 is: 346,765.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,228.70 : 628,215.63 = 251,279.69 : x
  2. Step 2: Convert to fraction form
    455,228.70/628,215.63 = 251,279.69/x
  3. Step 3: Cross multiply
    455,228.70x = 628,215.63 × 251,279.69
  4. Step 4: Simplify right side
    455,228.70x = 157,857,825,618.48
  5. Step 5: Solve for x
    x = 157,857,825,618.48/455,228.70
  6. Step 6: Final answer
    x = 346,765.98

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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.