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Finding the Fourth Proportional to 455.59, 629.40 and 368.11

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Solution

The fourth proportional to 455.59, 629.40 and 368.11 is: 508.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    455.59 : 629.40 = 368.11 : x
  2. Step 2: Convert to fraction form
    455.59/629.40 = 368.11/x
  3. Step 3: Cross multiply
    455.59x = 629.40 × 368.11
  4. Step 4: Simplify right side
    455.59x = 231,688.43
  5. Step 5: Solve for x
    x = 231,688.43/455.59
  6. Step 6: Final answer
    x = 508.55

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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.