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Finding the Fourth Proportional to 349.68, 524.16 and 219.36

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Solution

The fourth proportional to 349.68, 524.16 and 219.36 is: 328.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    349.68 : 524.16 = 219.36 : x
  2. Step 2: Convert to fraction form
    349.68/524.16 = 219.36/x
  3. Step 3: Cross multiply
    349.68x = 524.16 × 219.36
  4. Step 4: Simplify right side
    349.68x = 114,979.74
  5. Step 5: Solve for x
    x = 114,979.74/349.68
  6. Step 6: Final answer
    x = 328.81

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.