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Finding the Fourth Proportional to 344.13, 518.18 and 253.46

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Solution

The fourth proportional to 344.13, 518.18 and 253.46 is: 381.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    344.13 : 518.18 = 253.46 : x
  2. Step 2: Convert to fraction form
    344.13/518.18 = 253.46/x
  3. Step 3: Cross multiply
    344.13x = 518.18 × 253.46
  4. Step 4: Simplify right side
    344.13x = 131,334.04
  5. Step 5: Solve for x
    x = 131,334.04/344.13
  6. Step 6: Final answer
    x = 381.64

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.