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Finding the Fourth Proportional to 349.40, 479.35 and 346.57

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Solution

The fourth proportional to 349.40, 479.35 and 346.57 is: 475.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    349.40 : 479.35 = 346.57 : x
  2. Step 2: Convert to fraction form
    349.40/479.35 = 346.57/x
  3. Step 3: Cross multiply
    349.40x = 479.35 × 346.57
  4. Step 4: Simplify right side
    349.40x = 166,128.33
  5. Step 5: Solve for x
    x = 166,128.33/349.40
  6. Step 6: Final answer
    x = 475.47

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.