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Finding the Fourth Proportional to 455.09, 626.45 and 344.30

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Solution

The fourth proportional to 455.09, 626.45 and 344.30 is: 473.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    455.09 : 626.45 = 344.30 : x
  2. Step 2: Convert to fraction form
    455.09/626.45 = 344.30/x
  3. Step 3: Cross multiply
    455.09x = 626.45 × 344.30
  4. Step 4: Simplify right side
    455.09x = 215,681.88
  5. Step 5: Solve for x
    x = 215,681.88/455.09
  6. Step 6: Final answer
    x = 473.94

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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.