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Finding the Fourth Proportional to 455.84, 629.52 and 345.44

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Solution

The fourth proportional to 455.84, 629.52 and 345.44 is: 477.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    455.84 : 629.52 = 345.44 : x
  2. Step 2: Convert to fraction form
    455.84/629.52 = 345.44/x
  3. Step 3: Cross multiply
    455.84x = 629.52 × 345.44
  4. Step 4: Simplify right side
    455.84x = 217,461.39
  5. Step 5: Solve for x
    x = 217,461.39/455.84
  6. Step 6: Final answer
    x = 477.06

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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.