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Finding the Fourth Proportional to 387.45, 533.93 and 276.62

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Solution

The fourth proportional to 387.45, 533.93 and 276.62 is: 381.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    387.45 : 533.93 = 276.62 : x
  2. Step 2: Convert to fraction form
    387.45/533.93 = 276.62/x
  3. Step 3: Cross multiply
    387.45x = 533.93 × 276.62
  4. Step 4: Simplify right side
    387.45x = 147,691.66
  5. Step 5: Solve for x
    x = 147,691.66/387.45
  6. Step 6: Final answer
    x = 381.19

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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.