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Finding the Fourth Proportional to 388.24, 536.28 and 349.36

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Solution

The fourth proportional to 388.24, 536.28 and 349.36 is: 482.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    388.24 : 536.28 = 349.36 : x
  2. Step 2: Convert to fraction form
    388.24/536.28 = 349.36/x
  3. Step 3: Cross multiply
    388.24x = 536.28 × 349.36
  4. Step 4: Simplify right side
    388.24x = 187,354.78
  5. Step 5: Solve for x
    x = 187,354.78/388.24
  6. Step 6: Final answer
    x = 482.57

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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.