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Finding the Fourth Proportional to 451.65, 623.28 and 255.17

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Solution

The fourth proportional to 451.65, 623.28 and 255.17 is: 352.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    451.65 : 623.28 = 255.17 : x
  2. Step 2: Convert to fraction form
    451.65/623.28 = 255.17/x
  3. Step 3: Cross multiply
    451.65x = 623.28 × 255.17
  4. Step 4: Simplify right side
    451.65x = 159,039.24
  5. Step 5: Solve for x
    x = 159,039.24/451.65
  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.