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Finding the Fourth Proportional to 349.64, 481.38 and 313.88

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Solution

The fourth proportional to 349.64, 481.38 and 313.88 is: 432.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    349.64 : 481.38 = 313.88 : x
  2. Step 2: Convert to fraction form
    349.64/481.38 = 313.88/x
  3. Step 3: Cross multiply
    349.64x = 481.38 × 313.88
  4. Step 4: Simplify right side
    349.64x = 151,095.55
  5. Step 5: Solve for x
    x = 151,095.55/349.64
  6. Step 6: Final answer
    x = 432.15

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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.