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Finding the Fourth Proportional to 455.58, 628.95 and 306.44

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Solution

The fourth proportional to 455.58, 628.95 and 306.44 is: 423.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    455.58 : 628.95 = 306.44 : x
  2. Step 2: Convert to fraction form
    455.58/628.95 = 306.44/x
  3. Step 3: Cross multiply
    455.58x = 628.95 × 306.44
  4. Step 4: Simplify right side
    455.58x = 192,737.01
  5. Step 5: Solve for x
    x = 192,737.01/455.58
  6. Step 6: Final answer
    x = 423.06

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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.