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Finding the Fourth Proportional to 455,891.76, 629,143.20 and 251,955.90

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Solution

The fourth proportional to 455,891.76, 629,143.20 and 251,955.90 is: 347,706.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,891.76 : 629,143.20 = 251,955.90 : x
  2. Step 2: Convert to fraction form
    455,891.76/629,143.20 = 251,955.90/x
  3. Step 3: Cross multiply
    455,891.76x = 629,143.20 × 251,955.90
  4. Step 4: Simplify right side
    455,891.76x = 158,516,341,184.88
  5. Step 5: Solve for x
    x = 158,516,341,184.88/455,891.76
  6. Step 6: Final answer
    x = 347,706.09

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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.