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Finding the Fourth Proportional to 387.60, 535.41 and 276.81

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Solution

The fourth proportional to 387.60, 535.41 and 276.81 is: 382.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    387.60 : 535.41 = 276.81 : x
  2. Step 2: Convert to fraction form
    387.60/535.41 = 276.81/x
  3. Step 3: Cross multiply
    387.60x = 535.41 × 276.81
  4. Step 4: Simplify right side
    387.60x = 148,206.84
  5. Step 5: Solve for x
    x = 148,206.84/387.60
  6. Step 6: Final answer
    x = 382.37

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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.