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Finding the Fourth Proportional to 349.50, 480.29 and 291.18

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Solution

The fourth proportional to 349.50, 480.29 and 291.18 is: 400.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    349.50 : 480.29 = 291.18 : x
  2. Step 2: Convert to fraction form
    349.50/480.29 = 291.18/x
  3. Step 3: Cross multiply
    349.50x = 480.29 × 291.18
  4. Step 4: Simplify right side
    349.50x = 139,850.84
  5. Step 5: Solve for x
    x = 139,850.84/349.50
  6. Step 6: Final answer
    x = 400.15

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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.