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Finding the Fourth Proportional to 451.77, 623.34 and 255.21

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Solution

The fourth proportional to 451.77, 623.34 and 255.21 is: 352.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    451.77 : 623.34 = 255.21 : x
  2. Step 2: Convert to fraction form
    451.77/623.34 = 255.21/x
  3. Step 3: Cross multiply
    451.77x = 623.34 × 255.21
  4. Step 4: Simplify right side
    451.77x = 159,082.60
  5. Step 5: Solve for x
    x = 159,082.60/451.77
  6. Step 6: Final answer
    x = 352.13

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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.