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Finding the Fourth Proportional to 388.48, 533.12 and 344.64

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Solution

The fourth proportional to 388.48, 533.12 and 344.64 is: 472.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    388.48 : 533.12 = 344.64 : x
  2. Step 2: Convert to fraction form
    388.48/533.12 = 344.64/x
  3. Step 3: Cross multiply
    388.48x = 533.12 × 344.64
  4. Step 4: Simplify right side
    388.48x = 183,734.48
  5. Step 5: Solve for x
    x = 183,734.48/388.48
  6. Step 6: Final answer
    x = 472.96

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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.