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Finding the Fourth Proportional to 388.44, 533.21 and 344.70

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Solution

The fourth proportional to 388.44, 533.21 and 344.70 is: 473.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    388.44 : 533.21 = 344.70 : x
  2. Step 2: Convert to fraction form
    388.44/533.21 = 344.70/x
  3. Step 3: Cross multiply
    388.44x = 533.21 × 344.70
  4. Step 4: Simplify right side
    388.44x = 183,795.76
  5. Step 5: Solve for x
    x = 183,795.76/388.44
  6. Step 6: Final answer
    x = 473.16

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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.