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Finding the Fourth Proportional to 349.32, 485.40 and 345.52

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Solution

The fourth proportional to 349.32, 485.40 and 345.52 is: 480.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    349.32 : 485.40 = 345.52 : x
  2. Step 2: Convert to fraction form
    349.32/485.40 = 345.52/x
  3. Step 3: Cross multiply
    349.32x = 485.40 × 345.52
  4. Step 4: Simplify right side
    349.32x = 167,716.66
  5. Step 5: Solve for x
    x = 167,716.66/349.32
  6. Step 6: Final answer
    x = 480.13

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.