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Finding the Fourth Proportional to 480.70, 662.89 and 387.14

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Solution

The fourth proportional to 480.70, 662.89 and 387.14 is: 533.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    480.70 : 662.89 = 387.14 : x
  2. Step 2: Convert to fraction form
    480.70/662.89 = 387.14/x
  3. Step 3: Cross multiply
    480.70x = 662.89 × 387.14
  4. Step 4: Simplify right side
    480.70x = 256,631.41
  5. Step 5: Solve for x
    x = 256,631.41/480.70
  6. Step 6: Final answer
    x = 533.88

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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.