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Finding the Fourth Proportional to 317.49, 437.55 and 255.51

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Solution

The fourth proportional to 317.49, 437.55 and 255.51 is: 352.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    317.49 : 437.55 = 255.51 : x
  2. Step 2: Convert to fraction form
    317.49/437.55 = 255.51/x
  3. Step 3: Cross multiply
    317.49x = 437.55 × 255.51
  4. Step 4: Simplify right side
    317.49x = 111,798.40
  5. Step 5: Solve for x
    x = 111,798.40/317.49
  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.