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Finding the Fourth Proportional to 455,957.10, 629,297.34 and 308,715.18

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Solution

The fourth proportional to 455,957.10, 629,297.34 and 308,715.18 is: 426,078.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,957.10 : 629,297.34 = 308,715.18 : x
  2. Step 2: Convert to fraction form
    455,957.10/629,297.34 = 308,715.18/x
  3. Step 3: Cross multiply
    455,957.10x = 629,297.34 × 308,715.18
  4. Step 4: Simplify right side
    455,957.10x = 194,273,641,591.62
  5. Step 5: Solve for x
    x = 194,273,641,591.62/455,957.10
  6. Step 6: Final answer
    x = 426,078.77

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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.