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Finding the Fourth Proportional to 317.48, 437.81 and 255.51

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Solution

The fourth proportional to 317.48, 437.81 and 255.51 is: 352.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    317.48 : 437.81 = 255.51 : x
  2. Step 2: Convert to fraction form
    317.48/437.81 = 255.51/x
  3. Step 3: Cross multiply
    317.48x = 437.81 × 255.51
  4. Step 4: Simplify right side
    317.48x = 111,863.56
  5. Step 5: Solve for x
    x = 111,863.56/317.48
  6. Step 6: Final answer
    x = 352.35

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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.